Alchemical Hydra

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This article is about the boss variant of hydras. For the normal Slayer monster, see Hydra.

The Alchemical Hydra is a boss found in lower level of the Karuulm Slayer Dungeon in Mount Karuulm, requiring level 95 Slayer to kill. The Alchemical Hydra was the creation of an unnamed dragonkin. While the Dragonkin saw promise in his creation, he nevertheless saw it as a failure because he could not replicate its traits, and abandoned it along with his other creations; the Wyrms, Drakes, and Hydras.

Unlike normal hydras, the Alchemical Hydra can only be killed while on a hydra slayer task, which are only assigned by Konar. In addition, as it is only found within the volcano, players who have not completed the elite Kourend & Kebos Diary must wear boots of stone, boots of brimstone, or granite boots to protect themselves from the extreme heat of the dungeon floor.

Along with all the unique drops obtainable from hydras, it can also drop hydra leather, which is used on the machinery south-west of the pool in the Lithkren Vault to create ferocious gloves, as well as the hydra claw, which is combined with a Zamorakian hasta to create the dragon hunter lance.

The boss's lair[edit | edit source]

To reach the boss, players must run north past the Tasakaal, then east past the hydras. They will then reach the entrance to the lair by Orrvor quo Maten. Alternatively, players with level 88 Agility can reach it safely by using the mysterious pipe just behind Kaal-Ket-Jor, though this takes roughly the same time as reaching it by running past the hydras.

The Alchemical Hydra's lair is located in an instanced area with no limits to how many players can fight it on a world, unlike the Grotesque Guardians which are limited to eight instances per world. If the player dies battling the Alchemical Hydra, they can pay a 100,000 coin fee to reclaim their items from Orrvor quo Maten. If the player dies elsewhere before reclaiming their items from there, their unclaimed items will be permanently lost. In addition to this, Orrvor's storage capabilities do not stack with others (e.g. Zulrah, Grotesque Guardians), so if players have items being held by one of these fights and dies to the Alchemical Hydra, the items there will be lost.

Fight overview[edit | edit source]

Alchemical Hydra has four phases throughout the fight, depending on its remaining health. It attacks with Ranged and Magic, alternating between them every three attacks for the first three phases. At the start of each phase, it has a 75% damage reduction, which can be removed if it is lured over a vent on the floor which spews chemical liquid. However, the vent must be the correct one, corresponding to the combat triangle (e.g. when it is green, red will weaken it), otherwise the Hydra's damage is increased by up to 50%.

When the Alchemical Hydra reaches 75%, 50% or 25% of its health, it will lose one of its heads and changes phase. The damage reduction is reapplied, and so it should be lured over the next vent. It also has special attacks for each phase: poison pools when green and black, electricity when blue and fire when red. These special attacks can be avoided, but they can be devastating if dealt with carelessly.

When the Hydra is killed, it will respawn in approximately 25 seconds.

Drops[edit | edit source]

In addition to the 100% drop, the player will also have two rolls on the Alchemical Hydra's drop table. The first drop has a chance to be a unique, while the second is always standard. The drop rates in the drop table below reflect the effective chance of getting an item. For example, a drop rate of 2/100 indicates that you have two 1/100 chances of receiving the drop.[1]

Drops remain on the ground for 30 minutes, or until the player leaves the instanced area.

Unique and pet drop rates are based off Mod Munro's Twitter.[2] Other estimated drop rates are based off 10,518 kills.[3]

100%[edit | edit source]

Item Quantity Rarity GE market price
Hydra bones.png: Alchemical Hydra can drop the item Hydra bones with rarity Always in quantity 2 Hydra bones 2 Always 10,130

Unique[edit | edit source]

Due to a unique mechanic, items are very slightly rarer than officially announced.[4]
Item Quantity Rarity GE market price
Hydra's eye.png: Alchemical Hydra can drop the item Hydra's eye with rarity Rare in quantity 1 Hydra's eye 1 Rare (~1/181)[a 1] Not sold
Hydra's fang.png: Alchemical Hydra can drop the item Hydra's fang with rarity Rare in quantity 1 Hydra's fang 1 Rare (~1/181)[a 1] Not sold
Hydra's heart.png: Alchemical Hydra can drop the item Hydra's heart with rarity Rare in quantity 1 Hydra's heart 1 Rare (~1/181)[a 1] Not sold
Hydra tail.png: Alchemical Hydra can drop the item Hydra tail with rarity Rare in quantity 1 Hydra tail 1 Rare (~1/513) 260,195
Hydra leather.png: Alchemical Hydra can drop the item Hydra leather with rarity Rare in quantity 1 Hydra leather 1 Rare (~1/514) 6,256,427
Hydra's claw.png: Alchemical Hydra can drop the item Hydra's claw with rarity Very rare in quantity 1 Hydra's claw 1 Very rare (1/1,001) 20,061,201
Dragon thrownaxe.png: Alchemical Hydra can drop the item Dragon thrownaxe with rarity Very rare in quantity 500-1000 Dragon thrownaxe 500–1,000 Very rare (1/2,000) 145,000–290,000
Dragon knife.png: Alchemical Hydra can drop the item Dragon knife with rarity Very rare in quantity 500-1000 Dragon knife 500–1,000 Very rare (~1/2,001) 1,200,000–2,400,000
  1. 1.0 1.1 1.2 The order players receive the items in are: Hydra's eye, Hydra's fang and finally Hydra's heart.

Weapons and armour[edit | edit source]

Item Quantity Rarity GE market price
Mystic fire staff.png: Alchemical Hydra can drop the item Mystic fire staff with rarity Common in quantity 1 Mystic fire staff 1 Common (~16/100)[b 1] 25,362
Mystic water staff.png: Alchemical Hydra can drop the item Mystic water staff with rarity Common in quantity 1 Mystic water staff 1 Common (~16/100)[b 1] 25,281
Battlestaff.png: Alchemical Hydra can drop the item Battlestaff with rarity Common in quantity 8-12 (noted) Battlestaff 8–12 (noted) Common (~10/100) 67,576–101,364
Black d'hide body.png: Alchemical Hydra can drop the item Black d'hide body with rarity Common in quantity 1 Black d'hide body 1 Common (~10/100) 7,600
Dragon longsword.png: Alchemical Hydra can drop the item Dragon longsword with rarity Common in quantity 1 Dragon longsword 1 Common (~6/100) 59,470
Dragon med helm.png: Alchemical Hydra can drop the item Dragon med helm with rarity Common in quantity 1 Dragon med helm 1 Common (~6/100) 59,121
Rune platebody.png: Alchemical Hydra can drop the item Rune platebody with rarity Common in quantity 1 Rune platebody 1 Common (~6/100)[b 2] 38,534
Dragon battleaxe.png: Alchemical Hydra can drop the item Dragon battleaxe with rarity Common in quantity 1 Dragon battleaxe 1 Common (~4/100) 119,399
Rune platelegs.png: Alchemical Hydra can drop the item Rune platelegs with rarity Uncommon in quantity 1 Rune platelegs 1 Uncommon (~3/100)[b 2] 37,947
Rune plateskirt.png: Alchemical Hydra can drop the item Rune plateskirt with rarity Uncommon in quantity 1 Rune plateskirt 1 Uncommon (~3/100)[b 2] 37,999
Mystic robe top (light).png: Alchemical Hydra can drop the item Mystic robe top (light) with rarity Uncommon in quantity 1 Mystic robe top (light) 1 Uncommon (~2/100)[b 3] 71,818
Mystic robe bottom (light).png: Alchemical Hydra can drop the item Mystic robe bottom (light) with rarity Uncommon in quantity 1 Mystic robe bottom (light) 1 Uncommon (~2/100)[b 3] 47,599
  1. 1.0 1.1 Players will receive Mystic fire staff together with Mystic water staff
  2. 2.0 2.1 2.2 Players will receive Rune platebody together with Rune platelegs or Rune plateskirt
  3. 3.0 3.1 Players will receive Mystic robe top (light) together with Mystic robe bottom (light)

Runes and ammunition[edit | edit source]

Item Quantity Rarity GE market price
Chaos rune.png: Alchemical Hydra can drop the item Chaos rune with rarity Common in quantity 150-300 Chaos rune 150–300 Common (~12/100) 14,700–29,400
Death rune.png: Alchemical Hydra can drop the item Death rune with rarity Common in quantity 150-300 Death rune 150–300 Common (~12/100) 33,450–66,900
Blood rune.png: Alchemical Hydra can drop the item Blood rune with rarity Common in quantity 150-300 Blood rune 150–300 Common (~12/100) 43,650–87,300
Astral rune.png: Alchemical Hydra can drop the item Astral rune with rarity Common in quantity 150-300 Astral rune 150–300 Common (~12/100) 22,050–44,100
Dragonstone bolts (e).png: Alchemical Hydra can drop the item Dragonstone bolts (e) with rarity Common in quantity 100-120 Dragonstone bolts (e) 100–120 Common (~4/100) 49,200–59,040
Onyx bolts (e).png: Alchemical Hydra can drop the item Onyx bolts (e) with rarity Uncommon in quantity 35-50 Onyx bolts (e) 35–50 Uncommon (~2/100) 305,550–436,500

Herbs[edit | edit source]

There is approximately a 20/100 chance of receiving a herb drop.

Item Quantity Rarity GE market price
Grimy ranarr weed.png: Alchemical Hydra can drop the item Grimy ranarr weed with rarity Uncommon in quantity 10-15 (noted) Grimy ranarr weed 10–15 (noted) Uncommon (~1/40) 67,920–101,880
Grimy avantoe.png: Alchemical Hydra can drop the item Grimy avantoe with rarity Uncommon in quantity 10-15 (noted) Grimy avantoe 10–15 (noted) Uncommon (~1/40) 15,490–23,235
Grimy snapdragon.png: Alchemical Hydra can drop the item Grimy snapdragon with rarity Uncommon in quantity 10-15 (noted) Grimy snapdragon 10–15 (noted) Uncommon (~1/40) 81,680–122,520
Grimy torstol.png: Alchemical Hydra can drop the item Grimy torstol with rarity Uncommon in quantity 10-15 (noted) Grimy torstol 10–15 (noted) Uncommon (~1/40) 70,890–106,335
Grimy kwuarm.png: Alchemical Hydra can drop the item Grimy kwuarm with rarity Uncommon in quantity 25-30 (noted) Grimy kwuarm 25–30 (noted) Uncommon (~1/40) 25,800–30,960
Grimy cadantine.png: Alchemical Hydra can drop the item Grimy cadantine with rarity Uncommon in quantity 25-30 (noted) Grimy cadantine 25–30 (noted) Uncommon (~1/40) 30,525–36,630
Grimy lantadyme.png: Alchemical Hydra can drop the item Grimy lantadyme with rarity Uncommon in quantity 25-30 (noted) Grimy lantadyme 25–30 (noted) Uncommon (~1/40) 29,850–35,820
Grimy dwarf weed.png: Alchemical Hydra can drop the item Grimy dwarf weed with rarity Uncommon in quantity 25-30 (noted) Grimy dwarf weed 25–30 (noted) Uncommon (~1/40) 15,000–18,000

Seeds[edit | edit source]

There is approximately a 4/100 chance of receiving a seed drop.

Item Quantity Rarity GE market price
Torstol seed.png: Alchemical Hydra can drop the item Torstol seed with rarity Rare in quantity 2-3 Torstol seed 2–3 Rare (~1/240) 95,244–142,866
Ranarr seed.png: Alchemical Hydra can drop the item Ranarr seed with rarity Rare in quantity 2-3 Ranarr seed 2–3 Rare (~1/240) 77,886–116,829
Snapdragon seed.png: Alchemical Hydra can drop the item Snapdragon seed with rarity Rare in quantity 2-3 Snapdragon seed 2–3 Rare (~1/240) 103,514–155,271
Willow seed.png: Alchemical Hydra can drop the item Willow seed with rarity Rare in quantity 2-3 Willow seed 2–3 Rare (~1/266.67) 8,220–12,330
Watermelon seed.png: Alchemical Hydra can drop the item Watermelon seed with rarity Rare in quantity 30-45 Watermelon seed 30–45 Rare (~1/320) 3,450–5,175
Maple seed.png: Alchemical Hydra can drop the item Maple seed with rarity Rare in quantity 2-3 Maple seed 2–3 Rare (~1/320) 72,980–109,470
Yew seed.png: Alchemical Hydra can drop the item Yew seed with rarity Rare in quantity 2-3 Yew seed 2–3 Rare (~1/320) 164,178–246,267
Teak seed.png: Alchemical Hydra can drop the item Teak seed with rarity Rare in quantity 2-3 Teak seed 2–3 Rare (~1/320) 114–171
Mahogany seed.png: Alchemical Hydra can drop the item Mahogany seed with rarity Rare in quantity 2-3 Mahogany seed 2–3 Rare (~1/320) 6,736–10,104
Papaya tree seed.png: Alchemical Hydra can drop the item Papaya tree seed with rarity Rare in quantity 2-3 Papaya tree seed 2–3 Rare (~1/400) 7,274–10,911
Palm tree seed.png: Alchemical Hydra can drop the item Palm tree seed with rarity Rare in quantity 2-3 Palm tree seed 2–3 Rare (~1/533.33) 73,216–109,824
Magic seed.png: Alchemical Hydra can drop the item Magic seed with rarity Rare in quantity 2-3 Magic seed 2–3 Rare (~1/640) 271,360–407,040
Spirit seed.png: Alchemical Hydra can drop the item Spirit seed with rarity Very rare in quantity 2-3 Spirit seed 2–3 Very rare (~1/1,066.67) Not sold
Celastrus seed.png: Alchemical Hydra can drop the item Celastrus seed with rarity Very rare in quantity 2-3 Celastrus seed 2–3 Very rare (~1/1,600) 161,024–241,536
Dragonfruit tree seed.png: Alchemical Hydra can drop the item Dragonfruit tree seed with rarity Very rare in quantity 2-3 Dragonfruit tree seed 2–3 Very rare (~1/3,200) 312,888–469,332
Redwood tree seed.png: Alchemical Hydra can drop the item Redwood tree seed with rarity Very rare in quantity 2-3 Redwood tree seed 2–3 Very rare (~1/3,200) 67,520–101,280

Other[edit | edit source]

Item Quantity Rarity GE market price
Coins 10000.png: Alchemical Hydra can drop the item Coins with rarity Common in quantity 40000-60000 Coins 40,000–60,000 Common (~18/100) Not sold
Shark.png: Alchemical Hydra can drop the item Shark with rarity Common in quantity 2-4 Shark 2–4 Common (~14/100) 1,482–2,964
Ranging potion(3).png: Alchemical Hydra can drop the item Ranging potion(3) with rarity Common in quantity 1 Ranging potion(3) 1 Common (~14/100)[c 1] 932
Super restore(3).png: Alchemical Hydra can drop the item Super restore(3) with rarity Common in quantity 2 Super restore(3) 2 Common (~14/100)[c 1] 14,452
Dragon bones.png: Alchemical Hydra can drop the item Dragon bones with rarity Common in quantity 30 (noted) Dragon bones 30 (noted) Common (~12/100) 67,260
Rare drop table.png: Alchemical Hydra can drop the item Rare drop table with rarity Common in quantity 1-2 Rare drop table 1–2 Common (~4/100) Not sold
Crystal key.png: Alchemical Hydra can drop the item Crystal key with rarity Uncommon in quantity 1 Crystal key 1 Uncommon (~2/100) 21,874
  1. 1.0 1.1 Players will receive Ranging potion(3) together with two Super restore(3)

Tertiary drops[edit | edit source]

Item Quantity Rarity GE market price
Brimstone key.png: Alchemical Hydra can drop the item Brimstone key with rarity Uncommon in quantity 1 Brimstone key 1 Uncommon (1/50) Not sold
Alchemical hydra heads.png: Alchemical Hydra can drop the item Alchemical hydra heads with rarity Rare in quantity 1 Alchemical hydra heads 1 Rare (1/256) Not sold
Clue scroll (hard).png: Alchemical Hydra can drop the item Clue scroll (hard) with rarity Rare in quantity 1 Clue scroll (hard) 1 Rare (1/100) Not sold
Clue scroll (elite).png: Alchemical Hydra can drop the item Clue scroll (elite) with rarity Rare in quantity 1 Clue scroll (elite) 1 Rare (1/256) Not sold
Jar of chemicals.png: Alchemical Hydra can drop the item Jar of chemicals with rarity Very rare in quantity 1 Jar of chemicals 1 Very rare (1/2,000) 296,210
Ikkle hydra.png: Alchemical Hydra can drop the item Ikkle hydra with rarity Very rare in quantity 1 Ikkle hydra 1 Very rare (1/3,000) Not sold

Rare drop table

In addition to the drops above, this monster approximately has a 4/100 chance to access the standard rare drop table.

Show/hide rare drop table
Item Quantity Rarity GE market price
Coins 1000.png: Alchemical Hydra can drop the item Coins with rarity Rare in quantity 3000 Coins 3,000 Rare (1/145.45) Not sold
Loop half of key.png: Alchemical Hydra can drop the item Loop half of key with rarity Rare in quantity 1 Loop half of key 1 Rare (1/158.76; 1/157.54)[R 1] 11,938
Tooth half of key.png: Alchemical Hydra can drop the item Tooth half of key with rarity Rare in quantity 1 Tooth half of key 1 Rare (1/167.05; 1/165.7)[R 1] 9,629
Uncut sapphire.png: Alchemical Hydra can drop the item Uncut sapphire with rarity Rare in quantity 1 Uncut sapphire 1 Rare (1/640; 1/320)[R 1] 628
Runite bar.png: Alchemical Hydra can drop the item Runite bar with rarity Rare in quantity 1 Runite bar 1 Rare (1/640) 12,471
Nature rune.png: Alchemical Hydra can drop the item Nature rune with rarity Very rare in quantity 67 Nature rune 67 Very rare (1/1,066.67) 13,735
Rune 2h sword.png: Alchemical Hydra can drop the item Rune 2h sword with rarity Very rare in quantity 1 Rune 2h sword 1 Very rare (1/1,066.67) 37,973
Rune battleaxe.png: Alchemical Hydra can drop the item Rune battleaxe with rarity Very rare in quantity 1 Rune battleaxe 1 Very rare (1/1,066.67) 24,588
Uncut emerald.png: Alchemical Hydra can drop the item Uncut emerald with rarity Very rare in quantity 1 Uncut emerald 1 Very rare (1/1,280; 1/640)[R 1] 766
Law rune.png: Alchemical Hydra can drop the item Law rune with rarity Very rare in quantity 45 Law rune 45 Very rare (1/1,600) 8,955
Death rune.png: Alchemical Hydra can drop the item Death rune with rarity Very rare in quantity 45 Death rune 45 Very rare (1/1,600) 10,035
Steel arrow.png: Alchemical Hydra can drop the item Steel arrow with rarity Very rare in quantity 150 Steel arrow 150 Very rare (1/1,600) 4,800
Rune arrow.png: Alchemical Hydra can drop the item Rune arrow with rarity Very rare in quantity 42 Rune arrow 42 Very rare (1/1,600) 4,242
Adamant javelin.png: Alchemical Hydra can drop the item Adamant javelin with rarity Very rare in quantity 20 Adamant javelin 20 Very rare (1/1,600) 1,200
Rune sq shield.png: Alchemical Hydra can drop the item Rune sq shield with rarity Very rare in quantity 1 Rune sq shield 1 Very rare (1/1,600) 22,611
Dragonstone.png: Alchemical Hydra can drop the item Dragonstone with rarity Very rare in quantity 1 Dragonstone 1 Very rare (1/1,600) 12,175
Silver ore.png: Alchemical Hydra can drop the item Silver ore with rarity Very rare in quantity 100 (noted) Silver ore 100 (noted) Very rare (1/1,600) 7,400
Uncut ruby.png: Alchemical Hydra can drop the item Uncut ruby with rarity Very rare in quantity 1 Uncut ruby 1 Very rare (1/2,560; 1/1,280)[R 1] 1,412
Rune kiteshield.png: Alchemical Hydra can drop the item Rune kiteshield with rarity Very rare in quantity 1 Rune kiteshield 1 Very rare (1/3,200) 32,195
Dragon med helm.png: Alchemical Hydra can drop the item Dragon med helm with rarity Very rare in quantity 1 Dragon med helm 1 Very rare (1/3,200) 59,121
Rune spear.png: Alchemical Hydra can drop the item Rune spear with rarity Very rare in quantity 1 Rune spear 1 Very rare (1/3,378.14; 1/395.88)[R 1] 12,049
Shield left half.png: Alchemical Hydra can drop the item Shield left half with rarity Very rare in quantity 1 Shield left half 1 Very rare (1/6,756.29; 1/791.75)[R 1] 65,613
Rare drop table talisman.png: Alchemical Hydra can drop the item Unknown talisman with rarity Very rare in quantity 1 Unknown talisman
(please specify)
1 Very rare (1/6,826.67; 1/3,413.33)[R 1] Not sold
Dragon spear.png: Alchemical Hydra can drop the item Dragon spear with rarity Very rare in quantity 1 Dragon spear 1 Very rare (1/9,008.38; 1/1,055.67)[R 1] 37,971
Uncut diamond.png: Alchemical Hydra can drop the item Uncut diamond with rarity Very rare in quantity 1 Uncut diamond 1 Very rare (1/10,240; 1/5,120)[R 1] 2,867
Rune javelin.png: Alchemical Hydra can drop the item Rune javelin with rarity Very rare in quantity 5 Rune javelin 5 Very rare (1/20,480; 1/10,240)[R 1] 800
  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 The drop rate is increased when wearing a Ring of wealth.

Gallery[edit | edit source]

Changes[edit | edit source]

Date Changes
14 January 2019 (update) Hotfix The Alchemical Hydra gained access to Konar's drop table.[5]
31 January 2019 (update) The jar of chemicals was added as a possible tertiary drop.
7 February 2019 (update) The alchemical hydra heads was added as a possible tertiary drop.

References[edit | edit source]

  1. Jagex. Mod Ash's Twitter account. 13 January 2019. Mod Ash: "The first roll will go to the unique table OR to the standard table. The second roll will always go to the standard table. And you only get one pet roll in either situation."
  2. Jagex. Mod Munro's Twitter account. 13 February 2019. Mod Munro: "As I mentioned on the Q & A, here are the pictures of the drop rates for various parts of Kebos. This time with the correct drop rate for the pieces of the Brimstone Ring. [1]"
  3. Alchemical Hydra drop log
  4. Whether a unique item is dropped is determined by the game rolling each item in succession, and if it fails, the next item is rolled. If any item is successfully rolled, it will be dropped, and if no item is rolled, it is replaced by a regular drop. The order is dragon thrownaxe, dragon knife, hydra's claw, hydra tail, hydra leather and brimstone ring piece. For example, a brimstone ring piece rate follows the formula 1 / ((1999 / 2000) * (1999 / 2000) * (999 / 1000) * (511 / 512) * (511 / 512) * (1 / 180)) ≈ 1/181.07.
    Jagex. Mod Munro's Twitter account. 14 February 2019.
  5. Jagex. Old School RuneScape's Twitter account. 14 January 2019.