Whenever an opponent attacks you and/or one or more planeswalkers you control, exile the top card of that player's library. You may play that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast it.
Format Legality
Standard Not_legal
Pioneer Not_legal
Modern Not_legal
Legacy Legal
Vintage Legal
Commander Legal
Pauper Not_legal
