Grima, the Fell Dragon

Flying, Trample, Indestructible
Grima can only attack or block if it has 4 or more Fell counters.
Wings of Despair - When a creature dies, you may place a Fell counter on Grima. If you do, you can draw 1 card and lose 2 life.
Breath of Ruin- Remove 10 Fell counters from Grima: Exile all nonland permanents target player controls.