It's kind of like Emeria Angel, except for lifegain instead of Land drops, and it spits out much more powerful tokens
just kidding
Using the Book of Vile Darkness in combination with the Hand and Eye of Vecna, you can call him forth as an 8/8 indestructible Zombie God who can draw you cards, create Zombie tokens, and buff himself or another creature once per turn
From there, you can win on the spot with damage from cards like Goblin Bombardment or Purphoros, God of the Forge
With the cards being legal for Commander play, it also meant that the designs could both capture the characters and moments depicted but also be sweet standalone cards to add to your Commander decks
Anytime it attacks, you can sacrifice a Food token you get to draw a card, giving you plenty of answers for anything else your opponent might throw your way