Attuned Essence Gem

Used at 64.3S 45.5W:

Hello? I can feel your presence, faintly. I can't move. The Undead brought me up to this tower. They carried me through some large castle, and into a Great Hall. The last thing I remember passing before the opened the portal to this tower was a throne of some kind. Please help me, You're my only hope." The Gem pulses fitfully, giving a sensation of pulling upward.  You hear a faint voice in the back of your mind.  It sounds female, and really tired.