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Version 0.30: This article may not be up to date for the latest stable release of Crawl.
Necrotise.png Necrotise
Level 1
School1 Necromancy
Source(s) Book of Cantrips
Book of Necromancy
Casting noise 1
Spell noise 1
Power Cap 25
Range 5
Hated By Elyvilon
The Shining One
Flags Wl check, Dir or target, Needs tracer
Agonizingly rots away the victim's flesh. Those slain by this spell (or otherwise dying immediately afterward) may rise as skeletons to fight for the caster. Only the living can be affected.
Spell Details
Damage Formula 1d(4 + Power/5)
Max Damage 1d9 negative energy
Max Power 25
Range 5
Targeting Beam
To-hit Infinite
Special *Ignores AC
*Checks willpower

Necrotise is a level 1 Necromancy spell which fires a beam of negative energy against a single target; it must succeed against the enemy's willpower to function. If it kills the target, or the target is killed within 1.0 turn after, they will turn into a skeleton on your side.

Necromancers begin with this spell in their libraries. Kikubaaqudgha will always gift this spell at 1* of piety.

Useful Info

Other than dealing direct damage, this spell creates derived undead, in the form of skeletons.

HD of skeletons depends on the spellpower: minion_hd = mons_hd * (100 + pow) / 300. This means that at the max spellpower skeletons will have 1/2 of their original HD. Skeletons will last for around 27 turns, regardless of spellpower. There is no limit to the amount of skeletons that you can create.

Necrotise has an enchantment power multiplier of x3.5, which makes it significantly harder to resist than other early-game spells. However, due to the low spell power cap, it struggles to affect enemies in the mid-game onwards.


Necrotise deals decent damage that ignores AC and EV. For an XL 1 Necromancer, expect around a 60-80% chance for Necrotise to work (ignoring your own spell failure rate).

Note that your own skeletons can block Necrotise's line of fire.

Monster Spell

Monsters have access to the Pain spell, which deals the same damage but doesn't create a skeleton.