The game was in a much less finished state when I attempted to do this, and I can't imagine it played out as intended. Zevlor initiates combat when you tell him that they have to leave the grove, after Kagha asks you to deal with them. However, once hostilities arise, the Druids join in, saying something like "It's time to deal with the intruders". And it becomes a gigantic free-for-all Battle Royale in the grove. The Druids are hostile to the party and the Tieflings. So, one simply has to kill everyone. It was quite a mess really.
