Hero of the Eternal Prophecy

Bestow {1}{r}{w}{w} (If you cast this card for its bestow
cost, it's an Aura spell with enchant creature. It
becomes a creature again if it's not attached to a
creature.)
Whenever a Knight enters the battlefield under
your control, you may cast Hero of the Eternal Prophecy from your graveyard for its bestow cost
plus exile two other cards from your graveyard.
Enchanted creature gets +4/+2.