Terasasha, Scorn Incarnate

Flying, dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a
+1/+1 counter on it.)
Vendetta- If an opponent won the previous game, Terasasha and other creatures your team controls
enter the battlefield with a +1/+1 counter.
Each creature your team controls with a +1/+1
counter on it has first strike, vigilance, haste.