Snagret Hole

Snagret Hole enters the battlefield tapped.
{t}: Add {g}, {u}, or {r} to your mana pool.
{g}{u}{r}, {t}, Reveal a Snagret creature card in
your hand: You may put the revealed creature card onto the battlefield tapped. If you do, Snagret Hole doesn't untap during your next untap step.