Alchemical Hydra

Five headsFour heads
Three headsTwo heads
Alchemical Hydra
Released	10 January 2019 (Update)
Members	Yes
Combat level	426
Examine	A ferocious Alchemical Hydra!
Combat info
Hitpoints	1100
Max hit	17+17 (default); 26+26 (empowered)
Aggressive	Yes
Poison	Yes
Weakness	Stab, ranged, dragonbane weapons
Attack style	Ranged, magic
Attack speed
Slayer info
Slayer level	95
Slayer XP	1320
Category	Hydras
Assigned by
Combat stats
Aggressive stats
Defensive stats
Other bonuses

This article has a strategy guide here.

All information on mechanics and strategy will be on this page.

This article has a money making guide here: Killing the Alchemical Hydra.

Please add tips to the subpage, rather than the article below.

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]

Main article: Alchemical Hydra/Strategies

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 chance of getting an item for every roll on the standard loot table. For example, a drop rate of 2/100 indicates that you have two 2/100 chances of receiving that item.^[1]

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

Drop rates estimated based on 292,738 kills from the Old School RuneScape Wiki drop log project, unless otherwise cited.

100%[edit | edit source]

	Item	Quantity	Rarity	Price	High Alch
	Hydra bones	2	Always	11,170	192

Uniques[edit | edit source]

Due to a unique mechanic, items are very slightly rarer than officially announced and displayed here.^[2]

Item	Quantity	Rarity	Price	High Alch
Hydra's eye	1	1/181^{[d 1]}^[3]	Not sold	60,000
Hydra's fang	1	1/181^{[d 1]}^[3]	Not sold	60,000
Hydra's heart	1	1/181^{[d 1]}^[3]	Not sold	60,000
Hydra tail	1	1/513^[3]	87,835	60,000
Hydra leather	1	1/514^[3]	8,594,952	60,000
Hydra's claw	1	1/1,001^[3]	68,168,487	90,000
Dragon thrownaxe	500–1,000	1/2,000^[3]	127,000-254,000	225,000-450,000
Dragon knife	500–1,000	1/2,001^[3]	1,136,000-2,272,000	50,000-100,000

↑ ^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.

Armour and weaponry[edit | edit source]

Item	Quantity	Rarity	Price	High Alch
Mystic fire staff	1	8/101^{[d 1]}	25,135	25,500
Mystic water staff	1	8/101^{[d 1]}	25,249	25,500
Battlestaff	8–12 (noted)	5/101	65,536-98,304	33,600-50,400
Black d'hide body	1	5/101	7,324	8,088
Dragon longsword	1	3/101	59,404	60,000
Dragon med helm	1	3/101	59,077	60,000
Rune platebody	1	6/101^{[d 2]}	38,541	39,000
Dragon battleaxe	1	2/101	119,377	120,000
Rune platelegs	1	3/101^{[d 2]}	37,899	38,400
Rune plateskirt	1	3/101^{[d 2]}	37,861	38,400
Mystic robe top (light)	1	1/101^{[d 3]}	71,388	72,000
Mystic robe bottom (light)	1	1/101^{[d 3]}	47,551	48,000

↑ ^1.0 ^1.1 Players will receive Mystic fire staff together with Mystic water staff
↑ ^2.0 ^2.1 ^2.2 Players will receive Rune platebody together with Rune platelegs or Rune plateskirt
↑ ^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	Price	High Alch
Chaos rune	150–300	6/101	11,400-22,800	8,100-16,200
Death rune	150–300	6/101	31,200-62,400	16,200-32,400
Blood rune	150–300	6/101	49,950-99,900	36,000-72,000
Astral rune	150–300	6/101	25,050-50,100	4,500-9,000
Dragonstone bolts (e)	100–120	2/101	51,100-61,320	63,700-76,440
Onyx bolts (e)	35–50	1/101	303,485-433,550	315,000-450,000

Noted herbs[edit | edit source]

There is a 10/101 chance to get noted herbs.

Item	Quantity	Rarity	Price	High Alch
Grimy avantoe	10–15 (noted)	1/64.6	19,130-28,695	100-150
Grimy kwuarm	25–30 (noted)	1/64.6	31,025-37,230	300-360
Grimy ranarr weed	10–15 (noted)	1/80.8	77,630-116,445	180-270
Grimy snapdragon	10–15 (noted)	1/80.8	89,160-133,740	120-180
Grimy cadantine	25–30 (noted)	1/80.8	41,350-49,620	325-390
Grimy dwarf weed	25–30 (noted)	1/80.8	12,575-15,090	350-420
Grimy lantadyme	25–30 (noted)	1/107.7	37,000-44,400	325-390
Grimy torstol	10–15 (noted)	1/107.7	75,900-113,850	150-225

Seeds[edit | edit source]

There is a 2/101 chance of rolling the tree-herb seed drop table.

Item	Quantity	Rarity	Price	High Alch
Ranarr seed	2–3	1/420.8	98,258-147,387	60-90
Snapdragon seed	2–3	1/450.9	118,724-178,086	72-108
Torstol seed	2–3	1/573.9	105,042-157,563	84-126
Watermelon seed	30–45	1/631.2	2,880-4,320	990-1,485
Willow seed	2–3	1/631.2	7,416-11,124	18-27
Mahogany seed	2–3	1/701.4	5,940-8,910	56-84
Maple seed	2–3	1/701.4	63,580-95,370	56-84
Teak seed	2–3	1/701.4	174-261	56-84
Yew seed	2–3	1/701.4	137,608-206,412	170-255
Papaya tree seed	2–3	1/901.8	3,852-5,778	138-207
Magic seed	2–3	1/1,052.1	243,152-364,728	506-759
Palm tree seed	2–3	1/1,262.5	77,132-115,698	304-456
Spirit seed	2–3	1/1,578.1	Not sold	0
Dragonfruit tree seed	2–3	1/2,104.2	369,962-554,943	516-774
Celastrus seed	2–3	1/3,156.2	184,912-277,368	648-972
Redwood tree seed	2–3	1/3,156.2	65,222-97,833	780-1,170

Other[edit | edit source]

Item	Quantity	Rarity	Price	High Alch
Coins	5,550–25,550	0.5/101	5,550-25,550	5,550-25,550
Coins	40,000–60,000	9.5/101	40,000-60,000	40,000-60,000
Shark	2–4	7/101	1,612-3,224	204-408
Ranging potion(3)	1	7/101^{[d 1]}	605	172
Super restore(3)	2	7/101^{[d 1]}	15,350	288
Dragon bones	30 (noted)	6/101	69,030	2,880
Crystal key	1	1/101	20,129	90

↑ ^1.0 ^1.1 Players will receive Ranging potion(3) together with two Super restore(3)

Rare drop table[edit | edit source]

There is a 1/101 chance of rolling the rare drop table. This will give the player two rolls on the rare drop table

Item	Quantity	Rarity	Price	High Alch
Coins	3,000	1/615.62	3,000	3,000
Loop half of key	1	1/641.39; 1/636.61^{[d 1]}	9,826	60
Tooth half of key	1	1/641.39; 1/636.61^{[d 1]}	9,727	60
Uncut sapphire	1	1/2,585.6; 1/1,313^{[d 1]}	545	15
Runite bar	1	1/2,585.6	12,435	3,000
Nature rune	67	1/4,309.33	14,070	7,236
Rune 2h sword	1	1/4,309.33	37,834	38,400
Rune battleaxe	1	1/4,309.33	24,581	24,960
Uncut emerald	1	1/5,171.2; 1/2,626^{[d 1]}	734	30
Law rune	45	1/6,464	7,110	6,480
Death rune	45	1/6,464	9,360	4,860
Steel arrow	150	1/6,464	4,800	1,050
Rune arrow	42	1/6,464	2,562	10,080
Adamant javelin	20	1/6,464	1,160	1,920
Rune sq shield	1	1/6,464	22,503	23,040
Dragonstone	1	1/6,464	11,449	6,000
Silver ore	100 (noted)	1/6,464	5,800	4,500
Uncut ruby	1	1/10,342.4; 1/5,252^{[d 1]}	1,387	60
Rune kiteshield	1	1/12,928	32,094	32,640
Dragon med helm	1	1/12,928	59,077	60,000
Rune spear	1	1/13,647.7; 1/1,583.52^{[d 1]}^{[d 2]}	11,952	12,480
Shield left half	1	1/27,295.41; 1/3,167.04^{[d 1]}^{[d 2]}	65,229	66,000
Nature talisman	1	1/27,579.73; 1/14,005.33^{[d 1]}	701	2
Dragon spear	1	1/36,393.87; 1/4,222.71^{[d 1]}^{[d 2]}	37,567	37,440
Uncut diamond	1	1/41,369.6; 1/21,008^{[d 1]}	2,858	120
Rune javelin	5	1/82,739.2; 1/42,016^{[d 1]}	835	1,200

↑ ^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 of this item is increased when wearing a Ring of wealth.
↑ ^2.0 ^2.1 ^2.2 The Rune spear, Shield left half and Dragon spear will only be dropped if Legend's Quest has been started, or else a talisman will be dropped as a replacement.

Tertiary drops[edit | edit source]

Item	Quantity	Rarity	Price	High Alch
Brimstone key	1	1/50	Not sold	N/A
Alchemical hydra heads	1	1/256^[3]	Not sold	30,000
Clue scroll (hard)	1	1/100^[3]	Not sold	12
Clue scroll (elite)	1	1/256^[3]	Not sold	12
Jar of chemicals	1	1/2,000^[3]	75,884	0
Ikkle hydra	1	1/3,000^[3]	Not sold	N/A

Gallery[edit | edit source]

A concept of the Alchemical Hydra shown during RuneFest 2018.
A teaser image of the Alchemical Hydra in an area resembling Dragonkin architecture
The decapitation of one of the boss's heads, created by Mod Ghost
A piece of official artwork depicting the Alchemical Hydra.

Changes[edit | edit source]

Date	Changes
13 June 2019 (update)	Players can no longer logout in the Alchemical Hydra room due to an issue where players trying to log out in the room kept getting stuck in a state where they couldn't attack the boss but it kept trying to attack them..
7 February 2019 (update)	The alchemical hydra heads were added as a possible tertiary drop.
31 January 2019 (update)	The jar of chemicals was added as a possible tertiary drop.
14 January 2019 (update)	Hotfix The Alchemical Hydra gained access to Konar's drop table.^[4]

Trivia[edit | edit source]

The Alchemical Hydra is the only boss capable of attacking players underneath it.

References[edit | edit source]

↑ Jagex. Mod Ash's Twitter account. 13 January 2019. (Archived from the original on 16 Apr 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."
↑ 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. (Archived from the original on 16 Apr 2019.)
↑ ^3.00 ^3.01 ^3.02 ^3.03 ^3.04 ^3.05 ^3.06 ^3.07 ^3.08 ^3.09 ^3.10 ^3.11 ^3.12 Jagex. Mod Munro's Twitter account. 13 Feb 2019. (Archived from the original on 25 Mar 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."
↑ Jagex. Old School RuneScape's Twitter account. 14 January 2019.

[brimstone_ring-3] 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.

[dual-drop-5] 1.0 ^1.1 Players will receive Mystic fire staff together with Mystic water staff

[dual-drop-rune-6] 2.0 ^2.1 ^2.2 Players will receive Rune platebody together with Rune platelegs or Rune plateskirt

[dual-drop-mystic-7] 3.0 ^3.1 Players will receive Mystic robe top (light) together with Mystic robe bottom (light)

[dual-drop-pots-8] 1.0 ^1.1 Players will receive Ranging potion(3) together with two Super restore(3)

[row-9] 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 of this item is increased when wearing a Ring of wealth.

[rowm-10] 2.0 ^2.1 ^2.2 The Rune spear, Shield left half and Dragon spear will only be dropped if Legend's Quest has been started, or else a talisman will be dropped as a replacement.

[1] Jagex. Mod Ash's Twitter account. 13 January 2019. (Archived from the original on 16 Apr 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] 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. (Archived from the original on 16 Apr 2019.)

[Alchemical_Hydra-4] 3.00 ^3.01 ^3.02 ^3.03 ^3.04 ^3.05 ^3.06 ^3.07 ^3.08 ^3.09 ^3.10 ^3.11 ^3.12 Jagex. Mod Munro's Twitter account. 13 Feb 2019. (Archived from the original on 25 Mar 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."

[11] Jagex. Old School RuneScape's Twitter account. 14 January 2019.

[1]

[2]

[d 1]

[3]

[d 1]

[d 2]

[d 3]

[d 1]

[d 1]

[d 2]

[4]

v • d • e Alchemical Hydra
NPCs	Orrvor quo Maten Alchemical Hydra
Unique drops	Hydra's eye Hydra's fang Hydra's heart Hydra's claw Hydra tail Hydra leather Alchemical hydra heads Jar of chemicals Ikkle hydra
Equipment	Brimstone ring Dragon hunter lance Bonecrusher necklace Ferocious gloves
Other	Karuulm Slayer Dungeon Alchemical Attack!

Alchemical Hydra

Contents

The boss's lair[edit | edit source]

Fight overview[edit | edit source]

Drops[edit | edit source]

100%[edit | edit source]

Uniques[edit | edit source]

Armour and weaponry[edit | edit source]

Runes and ammunition[edit | edit source]

Noted herbs[edit | edit source]

Seeds[edit | edit source]

Other[edit | edit source]

Rare drop table[edit | edit source]

Tertiary drops[edit | edit source]

Gallery[edit | edit source]

Changes[edit | edit source]

Trivia[edit | edit source]

References[edit | edit source]

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