This is how Skull Grinder and his minions return from the dead goes in Revenge of the Skulls.
[The story begins in the Equestria graveyard]
[Skull Grinder stares at a picture of Twilight and her friends in his grave]
Skull Grinder: I have had it with those meddling Equines. They have outsmarted evil for generations. So I vowed to eliminate them all. [chuckles maliciously]
Skull Grinder: Twilight Sparkle, Rainbow Dash, Pinkie Pie, Rarity, Applejack, and Fluttershy cursed me.
[He stabs the picture of them with a dagger]
Skull Grinder: I will have my revenge.
[Skull Grinder rises from his grave]
[A few Skull Warriors also rise from their graves]
[Skull Slicer rises from his grave as well]
[Skull Basher rises from his grave]
[A few Skull Scorpios rise from their graves]