Sean, Thespian Entertainer

During your upkeep, you may put a verse
counter on Sean, Thespian Entertainer.
{1}{r}{w/u}, {t}: Search your library for an
instant or sorcery card with mana value equal to
the number of verse counters on Sean, Thespian Entertainer. This creature phases
out. (While it's phased out, it's treated as though it
doesn't exist. It phases in before you untap during
your next untap step.)