The Designers Three

Flying, Unworthy(While on the battlefield, this card cannot attack or block, has indestructible, shroud, and protection from everything, this card loses Unworthy until end of turn if you cast a mtgcardsmith.com card.)
{3}, {t}: Go to mtgcardsmith.com, you may cast the featured card until end of turn, if one of your cards is the featured card, you may cast it without paying its mana cost.