Miden'nir - beware of small agg mobs, small thieving mobs, and the entrance into the Asgard Nexus.
If you do happen to wander into the Nexus, follow these directions: leave, n, u. This brings you to Gre'Vos, from whom you may recall.
If you make a wrong turn you get dropped into the Empyreal Wastelands, a land of 300hp damage progs, which will in turn drop you into the maze full of wind devils in Ocean Keep.

Walk ( 7s ) to get from DH to the room marked in blue.