Upon entering the Underground Passage, Gurza can be found with Gresh, Torrack, and Worm. Of all the Goblins, Gurza appears the most bored, suggesting that they find a new hostage or that they set the whole Grove on fire.
Your attack summons thorny vines that possibly Ensnare your target.
Ensnared creatures cannot move and take 1d6Piercing damage at the start of each turn. An ally can use their Help action to try and tear away the vines.