one devil died of "pillar of flame", however a stack of spiders didn't, I hit next turn, these 0 life points monsters disappeared from the stack, and the surviving one had the correct amount of life points - I was too far to attack them
after some shots Pillar of Flame was greyed out, I wonder if there is a limit to the number of times you can cast it, the amount of damage it produces in .915 varies wildly, that is, more than in .914, still it's one of the most useful spells of the game along with Freeze