Monstrous basilisk

Monstrous basilisk
Released	15 September 2016 (Update)
Members	Yes
Combat level	135
Size	3x3
Examine	Let's hope I have some phoenix tears.
League region	Fremennik✓
Combat info
XP bonus	+0%
Max hit	11
Aggressive	No
Poisonous	No
Attack style	Slash
Attack speed	4 ticks (2.4 seconds)
Slayer info
Slayer level	40
Slayer XP	1,700 xp
Category	Basilisks
Assigned by
Combat stats
Aggressive stats
Melee defence
Magic defence
+35	No elemental weakness
Ranged defence
Immunities
Poison	Immune
Venom	Immune
	Open in DPS calculator
Advanced data
Monster ID	7395
Link	MOID

This article has a Slayer task guide here.

Information comparing locations for Slayer tasks will be on this page.

The monstrous basilisk is a superior variant of the basilisk. It has a chance of spawning after purchasing the unlock Bigger and Badder for 50 Slayer reward points from any Slayer master. Like their standard variant, a mirror shield or V's shield is required to safely engage them, as otherwise the player will take rapid damage and have their stats drained.

Drops

In addition to 100% drops and tertiary drops, superior slayer monsters will always roll 3 additional items, of which only 1 roll may be from the superior unique table. The other rolls are performed on the regular counterpart's table; their displayed drop chances represent a single roll.

Drop rates are estimated based on 48,470 samples from the Drop Rate Project, unless otherwise cited.

The average Monstrous basilisk kill is worth 114,483.26.

The average Monstrous basilisk kill while on a Konar task is worth 218,401.16.

100%

	Item	Quantity	Rarity	Price	High Alch
	Bones	1	Always	35	0
	Brimstone key	1	Always^{[d 1]}	Not sold	N/A

^ Brimstone keys are only dropped if killed on a Slayer task given by Konar quo Maten.

Weapons and armour

Item	Quantity	Rarity	Price	High Alch
Mithril axe	1	3 × 3/128	348	312
Mithril spear	1	3 × 2/128	255	507
Steel battleaxe	1	3 × 3/128	159	390
Adamant full helm	1	3 × 1/128	1,796	2,112
Mithril kiteshield	1	3 × 1/128	988	1,326
Rune dagger	1	3 × 1/128	4,441	4,800
Mystic hat (light)	1	3 × 1/512	8,569	9,000

Runes

Item	Quantity	Rarity	Price	High Alch
Water rune	75	3 × 8/128	375	150
Nature rune	15	3 × 5/128	1,575	1,620
Law rune	3	3 × 3/128	378	432
Nature rune	37	3 × 1/128	3,885	3,996

Herbs

There is a 35/128 chance of rolling the herb drop table.

Item	Quantity	Rarity	Price	High Alch
Grimy guam leaf	1	3 × 1/14.6	224	7
Grimy marrentill	1	3 × 1/19.5	140	8
Grimy tarromin	1	3 × 1/26	154	9
Grimy harralander	1	3 × 1/33.4	390	9
Grimy ranarr weed	1	3 × 1/42.6	5,383	18
Grimy irit leaf	1	3 × 1/58.5	1,794	10
Grimy avantoe	1	3 × 1/78	1,719	10
Grimy kwuarm	1	3 × 1/93.6	2,521	12
Grimy cadantine	1	3 × 1/117	2,802	13
Grimy lantadyme	1	3 × 1/156	1,652	13
Grimy dwarf weed	1	3 × 1/156	1,786	14

Materials

	Item	Quantity	Rarity	Price	High Alch
	Adamantite ore	1	3 × 3/128	553	240

Coins

The overall chance of rolling a coin drop is 57/128 with an average value of 102.

Item	Quantity	Rarity	Price	High Alch
Coins	44	3 × 29/128	44	44
Coins	200	3 × 17/128	200	200
Coins	132	3 × 5/128	132	132
Coins	11	3 × 5/128	11	11
Coins	440	3 × 1/128	440	440

Gem drop table

There is a 5/128 chance of rolling the gem drop table.

Item	Quantity	Rarity	Price	High Alch
Nothing	N/A	3 × 1/51.29; Never^{[d 1]}	N/A	N/A
Uncut sapphire	1	3 × 1/102.4; 1/52^{[d 2]}	284	15
Uncut emerald	1	3 × 1/204.8; 1/104^{[d 2]}	541	30
Uncut ruby	1	3 × 1/409.6; 1/208^{[d 2]}	1,221	60
Chaos talisman	1	3 × 1/1,092.27; 1/554.67^{[d 2]}	217	2
Uncut diamond	1	3 × 1/1,638.4; 1/832^{[d 2]}	2,752	120
Rune javelin	5	3 × 1/3,276.8; 1/1,664^{[d 2]}	965	1,200
Loop half of key	1	3 × 1/3,276.8; 1/1,664^{[d 2]}	10,458	60
Tooth half of key	1	3 × 1/3,276.8; 1/1,664^{[d 2]}	10,470	60
Rune spear	1	3 × 1/52,428.8; 1/3,120^{[d 2]}^{[d 3]}	11,887	12,480
Shield left half	1	3 × 1/104,857.6; 1/6,240^{[d 2]}^{[d 3]}	65,082	66,000
Dragon spear	1	3 × 1/139,810.13; 1/8,320^{[d 2]}^{[d 3]}	39,041	37,440

^ The "nothing" drop is removed while wearing a ring of wealth.
^ ^2.00 ^2.01 ^2.02 ^2.03 ^2.04 ^2.05 ^2.06 ^2.07 ^2.08 ^2.09 ^2.10 The drop rate is increased while wearing a ring of wealth due to the "nothing" drop being removed.
^ ^3.0 ^3.1 ^3.2 Only dropped if Legends' Quest has been finished; if not, a talisman is dropped instead.

Tertiary

	Item	Quantity	Rarity	Price	High Alch
	Basilisk bone	1	1/4^{[d 1]}	Not sold	0
	Basilisk head	1	1/2,000	Not sold	2,400

^ Basilisks bone are only dropped during Rag and Bone Man II.

Superior Slayer tertiary

The chance to spawn a superior creature is 1/200.^{[d 1]}

Item	Quantity	Rarity	Price	High Alch
Mist battlestaff	1	1/293	66,663	9,300
Dust battlestaff	1	1/293	10,574	9,300
Eternal gem	1	1/1,024	7,885,491	5,700
Imbued heart	1	1/1,024	107,250,682	300,000

^ The superior creature spawn rate increases to 1/150 after unlocking the elite Combat Achievements rewards tier.

Changes

Date	Changes
8 May 2024 (Update)	Superior slayer monsters are now guaranteed to drop brimstone keys when on a task from Konar.
23 February 2017 (Update \| poll)	The monstrous basilisk was given a graphical update to be more distinguishable from their regular variant.

Gallery (historical)


15 September 2016 – 23 February 2017	23 February 2017 – present

Trivia

The monster's examine text is a reference to the Harry Potter series, in which phoenix tears are one of the only cures for a basilisk's powerful venom. However, basilisks in Old School RuneScape aren't venomous.

[1] Brimstone keys are only dropped if killed on a Slayer task given by Konar quo Maten.

[nothing-2] The "nothing" drop is removed while wearing a ring of wealth.

[row-3] 2.00 ^2.01 ^2.02 ^2.03 ^2.04 ^2.05 ^2.06 ^2.07 ^2.08 ^2.09 ^2.10 The drop rate is increased while wearing a ring of wealth due to the "nothing" drop being removed.

[legend-4] 3.0 ^3.1 ^3.2 Only dropped if Legends' Quest has been finished; if not, a talisman is dropped instead.

[5] Basilisks bone are only dropped during Rag and Bone Man II.

[6] The superior creature spawn rate increases to 1/150 after unlocking the elite Combat Achievements rewards tier.

[d 1]

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[d 2]

[d 3]

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