The drow that addressed the adventurers turn his head down as if listening to someone next to him behind the boulders.
"You're far away from wherever you call home. Head back north if you want to leave this place unharmed."
The hidden drows stand up form where they were, showing their longbows ready.
And since the DM knows you won't go back north, since all you are heading south (with the exception of Ilmo), feel free to start the first round, everyone. Also, I'll need a new Perception check. Aukan, Lerithyn and Ra'sakar can also make an Intelligence check.