[Taqwus]

Maggots is deadly. IIRC it's capped at how much damage it can do, 'tho; ISTR having a PoD barely survive it once, and I don't think he had regen items on him.

Spell targeting is probably similar to other spells, other than that it'll only target undead (and perhaps only corporeals; ethereal IIRC means that the spell will only rarely work) -- which can be interesting if you're using a Prince of Death with a living army attacking an army with druids. Been there, done that, smacked forehead.