Casting Cost:

+2: Untap all creatures you control. Those creatures get +1/+1 until end of turn.

0: Until end of turn, Gideon, Martial Paragon becomes a 5/5 Human Soldier creature with indestructible that's still a planeswalker. Prevent all damage that would be dealt to him this turn.

−10: Creatures you control get +2/+2 until end of turn. Tap all creatures your opponents control.