+1: Put a loyalty counter on Gideon, Champion of Justice for each creature target opponent controls.
0: Until end of turn, Gideon, Champion of Justice becomes an indestructible Human Soldier creature with power and toughness each equal to the number of loyalty counters on him. He's still a planeswalker. Prevent all damage that would be dealt to him this turn.
-15: Exile all other permanents.