Fyrmount Abyss

Fyrmount Abyss is single person instance that is part of quest.

Teleporter is found on south side of Molten Reach, directly east from Akasha's Hideout entrance. (It was moved on level 70 patch, it was previous on north side of Molten Reach).

and have finally located the kidnapped Core and. It's about 5 minutes long protection mission against monster waves that Akasha sends and final boss Cauterask.