Ambitions Price

Whenever an opponent attacks you, exile the top card of that players library. You may play that card for as long as it remains exiled and you may spend mana as thought it were mana of any color to cast spells this way.

Unravel-Exile the top card of each opponents library. You may play them for as long as they remain exiled and may spend mana as though it were mana of any color to cast spells this way.