Gisela, Blade of Goldnight [Avacyn Restored]

Set: Avacyn Restored Type: Legendary Creature — Angel Rarity: Mythic Cost: {4}{R}{W}{W} Flying, first strikeIf a source would deal damage to an opponent or a permanent an opponent controls, that source deals double that damage to that player or permanent instead.If a source would deal damage to you or a permanent you control, prevent half that damage, rounded up.