Whatever kind of undead Raziel counts as. Double undead vampire = soul devouring wraith? Hey, manifesting on both spiritual and physical realms is neat.

Skeleton:

• When the hero comes into the tomb, I want it to be dead first, no faffing about with boss fight (which they always win) BS.
• I like the musical nature of their bones.
• I already am one, sort of...

I would be the kind of ghost that could possess people so I could bang their wives using their bodies but somehow when I cum, the possessed penis shoots out my actual sperm so I can forever keep my sainted genome alive

Tiamat

One that can shape-shift so I can change my bodies sex to the one that aligns with my gender identity and be fully conscious and self aware but I'd also line to have free will

I'd also want to have all powerful magic as well

The kind that instantly kills the necromancer, then returns to being dead.

Oh hell no. A fumbled 1, shambling back into sweet death-death within moments, possibly dragging him with me.

I guess a skeleton. Id be reach on account of all the bones

Alhoon