Did you get part of this from Butterfly Effect?
Also shouldn't the unupped say turn into Ash Eater, not brimstone eater?
Not really. Cost=!attack.
Also, it kind of ruins the "generates
" part to make it spawn Ash Eaters, but I'll consider it.
If the effect was not meant to take advantage of death effects, you could possibly grant the Fire ability to the target, rather than have it morph into a Brimstone Eater.
Oh, yeah, it triggers death effects. I should add that to the notes.