Originally Posted by you
However I do not remember this being in dks:
—
Conjure the spirits to bring to life a creature made from body parts you have collected during your battles. This creature’s power is literally the sum of his body parts; once you are able to assemble this abomination, summon it to support you in combat!

That was in the original game. It's the undead pet you can make with the help of the Necromancers. You have to do a quest to get the crystal skulls that allow you to summon it first though.