Dog Moon
Adventurer
Shade said:The golem swarm isn't unreasonable at all. It is essentially an army of stone toy soldiers. It has no energy immunities, and its deadliest ability lets it quickly dismantle nonmagical objects.
There's also a swarmshifter template in Libris Mortis that allows undead to take a swarm like form, if that helps.
Hey, idea for a creature: Spellstitched, Evolved Mummy Swarm Swarmshifter! Mmmm, mummy swarm.
[Ironically, I think I've used the Swarmshifter Template on more non-Undead than Undead... illegal, technically, but allowed for some interesting creatures thematically]