Akawalli, the Seething Tower

Akawalli, the Seething Tower

Legendary Creature - Fungus | Power/Toughness: 3 / 3 (CMC 3)
Descend 4 -- As long as there are four or more permanent cards in your graveyard, Akawalli, the Seething Tower gets +2/+2 and has trample.
Descend 8 -- As long as there are eight or more permanent cards in your graveyard, Akawalli gets an additional +2/+2 and can't be blocked by more than one creature.