Main Questline,Miscarcand

Okay since no-one helped you , I will but please bear with me. The first point of frustration will be a false wall right after the main entrance. In front of you will be a wall but the map shows a hallway extending beyond that..don't worry about it now. You'll find out why later. The first trick is in this first section. In the western most room you'll find a glowing button on the wall. Press it to open the gate located just before the next section, Sel Vanua. In Sel Vanua you'll have to find two buttons. In chronological order you reach the one in the big room in the NE corner first. This will raise a cage to a Varla stone. The second button is in the Southern hallway. This will open a gate to the next section, Morimath. Stick to the high ground in Morimath. You'll eventually reach the great welkynd stone. This will lower a couple of false walls and freeing the great Miscarcand King from his confines. Once he's dead take the Miscarcand Key from him and head towards the hidden hallway he came from. This key will open the locked gate , which will lead you back to the entrance. That's the best I can do , hope it helps.

Press the glowing button, press two another buttons in later, stay on high ground, when he dies, take the key from him and get to the hidden hallway, the key should get it open.