Ym, Repentant Criminal

Ym, Repentant Criminal enters the battlefield under an opponent's control. Whenever a creature under its owner's control dies, if Ym, Repentant Criminal
isn't under its owner's control, exile it then return
him to the battlefield under its owner's control.
{t}: Until end of turn, creatures you control gain lifelink, first strike, and haste. Activate this ability only if Ym, Repetant Criminal is under its owner's control
"It was forty years ago..."