Hills Antagonist

Hills Antagonist enters the battlefield tapped,
unless you pay 2 life.
{t}: Add {g}{g}
{t}: Add {g} and two mana of any other one color.
If you add {r}, discard a card from your hand.
If you add {b}, sacrifice a creature.
If you add {u}, exile a card from your graveyard.
If you add {w}, creatures you control lose
Hexproof until the end of turn.