Drakthor, the Death Knight

All friendly skeletons or undead ain +1/+1.
When this creature dies, summon 2 1/1 zombies, then sacrifice all zombies and but an X/X zombie monstrosity onto the battlefield, where X equals the Power and toughness of all the zombies you sacrificed.
"In life, he was a mighty Paladin, in death, while his wrath remained, his mercy did not."