Hogaak, Arisen Necropolis
{5}{B/G}{B/G}
Legendary Creature -- Avatar
8/8
You can't spend mana to cast ~this~.
Convoke, delve (Each creature you tap while casting ~this~ 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~ from your graveyard.
Trample