Gale's Redirection [CLB]

Gale's Redirection

Instant

Exile target spell, then roll a d20 and add that spell's mana value.1—14 | You may cast the exiled card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.15+ | You may cast the exiled card without paying its mana cost for as long as it remains exiled.