Can be crushed to magically summon a Yochlol with a 30% chance of success. If the attempt fails, the
summoner takes 5 (1d10) psychic damage. The summoned demon
appears in an unoccupied space within 12m of its summoner, acts as
an ally of its summoner, and can't summon other demons. It remains
for 10 minutes, until it or its summoner dies, or until its summoner
dismisses it as an action.