Holvik is part of Gekh Coal's task force to retrieve Sergeant Thrinn's stolen boots. If speaking with him as a non-drow party member, Holvik expresses disgust at their casualties, which were caused by Myconid hallucinations that led members to leap to their deaths.
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.