Myrranthine Monument

Enters the battlefield tapped unless you discard a
card, if you do Scry X, where X equals the
discarded card's casting cost.
{t}: Add {c} to your mana pool.
{1}{t}: Add{u}, {b}, or {w} to your mana pool.
{w/u}{u}{u/b}: Myrranthine Monument becomes a 3/4 Artifact Creature Sphinx Seer with Flying until
end of turn and you Scry 1.