Gozoth, Ravenous Troll

When Gozoth, Ravenous Troll enters the battlefield, choose Gruul or Golgari.
Golgari - Discard a creature card: Put a +1/+1 counter on Gozoth, it gains indestructible until end of turn.
Gruul - {1}{g},{t}: Put a +1/+1 counter on Gozoth, it fights target creature an opponent controls.