Its main ability is, for two colorless, one blue and one black, that you can exile a creature from a graveyard to create a 4/4 black zombie token in its place
He can also discard and draw his hands whenever the Ring tempts him, including when his army deals damage to a player
Its a bit unique how it works since it activates from the graveyard, but that makes it a very difficult sac outlet to interact with
Bundle of all 4 Collector's Edition Warhammer 40,000 Commander DecksThe Ruinous Powers, Necron Dynasties, Forces of the Imperium, and Tyranid Swarm
To double a player's life total, that player gains as much life as needed so that their life total is twice the number it was before
As long as they all play well together you can do whatever you want