Summon Minor Demon
Version 0.18: This article may not be up to date for the latest stable release of Crawl.
Summon Minor Demon is a monster-only spell that summons 1-3 lesser demons, with a duration dependent on the spellcaster's HD.
The following enemies cast Summon Minor Demon:
Strategy
This spell is usually the least of your problems. In fact, it can in some cases be downright helpful, as the summoned demons may block line of sight to monsters that would otherwise do nasty things to you.