Golgari Graveseer

When Golgari Graveseer enters the battlefield, choose Undergrowth A or Undergrowth B.
Undergrowth A:Target opponent loses X life, where X is the number of non-Golgari cards in your graveyard.
Undergrowth B: You gain X life, where X is the number of non-Golgari cards in your graveyard.
{b}{b}{b}, {t}: Target creature gains deathtouch until end of turn.
{g}{g}{g}, {t}: Sacrifice X non-Golgari lands, add X{b/g} to your mana pool, Golgari Graveseer gains +X/+half of X, rounded up.