Hogaak Junior, Arisen Treefolk

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 Hogaak Junior, Arisen Treefolk
from your graveyard.
Trample