Gideon, Champion of Justice

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