Eren Yeager, Eldia's Hope

Training (Whenever this creature attacks with another creature with greater power, put a
+1/+1 counter on this creature.)
Resolve of the Founding Titan: {1}{g}{w},
Exile Eren Yeager, Eldia's Hope: Transform
him. Activate only if you control three or more creatures and Eren Yeager attacked this turn.
"If we don’t fight, we can’t win. That’s the
truth of our world."