The Big Bang

When this card enters the battlefield, add {e}{e}{e}{e}{e}{e}.
As an additional cost to cast this spell, sacrifice two lands unless you pay {c}{c}{c}
Pay {e}: Create a gold Supernova token artifact.
{t}: Add 1 mana of any color to your mana pool.
{2}{b}: Target creature gets -2/-5 until end of turn.