Gisela, Blade of Goldnight [Open the Helvault]

Description

Set:	Open the Helvault
Type:	Legendary Creature — Angel
Rarity:	Mythic
Cost:	{4}{R}{W}{W}

Flying, first strike
If 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.