The Paladin Argent

Convoke, Vigilance

{w}{w}: Choose artifact, creature, instant,
enchantment, or sorcery. Reveal the top card
of your deck. If a spell of the chosen type is
revealed, exile it. You may cast the spell from
exile as if it had convoke. At the end of the
turn, if the spell was not cast, shuffle it into
your deck. Active this ability only as a sorcery.