Odin, God of Magic

+4: Create a 3/3 Einherjar creature token with First Strike and Lifelink and Create a 5/5 Valkyrie creature token with Flying and Lifelink
0: Counter target spell, then copy that spell under your control. You can play this at any time
-10: All lands, enchantments, and artifacts become 10/1 Raven creature tokens with First Strike, Flying and Trample