Dergan the Redeemed

Spells and abilities your opponents control cannot cause you to sacrifice Dergan the Redeemed.
Whenever a creature or planeswalker dealt damage by Dergan the Redeemed this turn dies, you may search your library for an Aura or Equipment card and put it onto the battlefield attached to Dergan the Redeemed.
Whenever an opponent loses the game, put five +1/+1 counters on Dergan the Redeemed.