3uuInstant

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.

Warnis had always felt a glimmer of potential within herself, flickering just out of reach. That night, as the cultists attacked, it became a torrent of power that was hers to command.