Fulun, Forsaken Hero

Vigilance, first strike
When Fulun, Forsaken Hero enters the battlefield, Search your library for a cleric card,
Put it into your hand and shuffle your library.
{w/b}{w/b}: Target cleric gets +1/+1 and Menace, If
there are twenty or more cards in target
opponents graveyard, you may transform Fulun, Forsaken Hero.