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Version 0.24: This article may not be up to date for the latest stable release of Crawl.
Ilsuiw mIlsuiw.png
HP 100-203
HD 16
XP 1897
Speed 10 (swim: 60%)
AC 7
EV 18
Will 140
Attack1 10 (hit: plain)

Resistances rDrown
Vulnerabilities None
Habitat Amphibious
Intelligence Human
Uses Weapons & armour
Starting equipment
Open doors
Holiness Natural
Size Medium
Type merfolk, merfolk
Flags Speaks
A deadly merfolk water-witch, who uses her dominion over the tides to draw unwitting adventurers to their deaths.

“We have lingered in the chambers of the sea
By sea-girls wreathed with seaweed red and brown
Till human voices wake us, and we drown.”
-T.S. Eliot, _The Love Song of J. Alfred Prufrock_. lines 129-131. 1915.

For a list of all merfolk, see list of merfolk.

Useful Info

Ilsuiw, Witch of the Tides is a unique merfolk aquamancer that is often found in the Shoals. She rarely appears without a large band of fellow merfolk.



Spell set I
Slot1 Throw Icicle (3d25) Wizard flag
Slot2 Call Tide Wizard flag
Slot3 Invisibility Wizard flag
Slot4 Blink Wizard flag
Slot5 Summon Water Elementals Wizard flag

Tips & Tricks

See invisible, flying (to avoid being stuck in shallow water the entire fight), and the means to kill her quickly are all highly recommended before taking her on. Between her high HP and decent EV, she can be tricky. Her water elementals deal surprising amounts of damage, and she can summon a lot of them. If you're in melee with her while in water, both she and her elementals can outrun you; some form of haste or other escape may be necessary. Note that she lacks any resistances; poison can be very effective in taking her down, possibly after you have had to flee from her and her summons. Other area-of-effect spells can help deal with both her and her entourage at the same time. It's often easier to pick off a few members of her army at a time before fleeing back upstairs to heal.


  • Prior to 0.22, Ilsuiw was guaranteed to spawn somewhere in the Shoals, and almost always spawned in a special vault on Shoals:4.