It's all in the cards!
Henzell says...
Determined by spell power, just like damage. Not affected by slaying, but affected by amulet of inaccuracy. For hit chance vs monster EV at a given spell power for a range of spells, see 'https://anydice.com/program/17f2e'

Information based on master branch and the great LearnDB.
© Dungeon Crawl Stone Soup, 2010.