Groove should by changed by now ...
You can find some oil barrels diged in the ground in front of gates ... if so, you are in "siege" phase now, that would mean you are suppose to "infiltrate" the groove ... wich means, you are suppose to talk with Zevlor on that gate, and then blow his ... ehm ... that giant warhorn, that Wyll blowed in first attack.
That will signal Minthara, that you are in position and she started the assault.
