Hogaak, Arisen Necropolis - 202 R MH1

You can't spend mana to cast this spell.
Convoke, delve (Each creature you tap while casting this spell pays for {1} or one mana of that creature's color. Each card you exile from your graveyard pays for {1}.)
You may cast this card from your graveyard.
Trample

rare
Legendary Creature — Avatar
From the Magic: The Gathering set Modern Horizons.