Version 0.21: This article may not be up to date for the latest stable release of Crawl.
Waterstrike is a monster-only spell which causes the water beneath its target to rise up and drown the victim, dealing unavoidable asphyxiation damage with smite-targeting. It can only affect targets that are currently standing in or flying above shallow or deep water, and only if they are susceptible to asphyxiation.
The following enemies cast Waterstrike:
Waterstrike was added in 0.14.