Borinthrall, Stoneborn Capital

Borinthrall, Stoneborn Capital enters the battlefield tapped, unless you control three or more creatures.
{t}: to add {w}{w}, {w}{r} or {r}{r} to your mana pool.
{2}{w}{r}{t}: sacrifice Borinthrall, Stoneborn Capital to search your library for up to three creature cards, reveal them and put them into your hand.