Cost of Insubordination

Whenever a creature deals combat damage to
you, you may prevent that damage unless its controller pays either {2} or {p/b}. If you do, you
may have target planeswalker lose X loyalty counters where X is the damage prevented this
way.
"Behold, this is what happens to those who defy me. For all of you who believe in a rebellion, I assure you that it is all but useless!" --Valhalla, Brother of Ob Nixilis