[+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.