When Way of the Cryomancer enters, empower Jace 5. (Put five loyalty counters on a Jace token you control. If you don't control one, first create a blue Jace planeswalker token with "[−1]: Surveil 1" and "[−3]: Draw a card.")
Planeswalkers you control have "[−3]: When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy."
