The Fourth Warrior, Task for the Ardent Cowl: Living Stone

Juna will send you to find the Ardent Mages in the catacombs under Mistmoore. They can be found on the ledge near the Myr'Dal, south west from the Ascent in the middle. The Head Ardent Mage will tell you to repower the cowl, you must do a favor for each of her children and herself. This task is from one of the Children, it requires you to kill 20 gargoyles. Then return.