Idun Apprentice of Time

+1: The next spell you cast this turn has split second. If that spell is an instant or sorcery, it gains rebound.
-3: Until your next turn, creatures you control have haste, and gain first strike until end of turn when they block.
-10: You get an emblem with "Untap all permanents you control during each players untap step. You may cast spells as though they had flash."