Well I didn't play CF at the time and don't know her description or even title, but it seems to me that the age-ender deserves some "special" treat out there, depicting her role in the destruction of Thera. So here's my idea.

On the graveyard spot:

Gazing around you see a large area that is
particularily empty. In fact there is a gaping
grave-shape hole going down through the ground,
with not only bottom, but even walls being
invisibly pitch-black, as if the gravesite itself
was a portal to... nothing. The air around
the grave is unusually cold, almost freezing,
and from the distorted shape if it it seems
that the space directly above the gravesight
and into the sky is also absolutely empty, having
no air in it, with even light trying to avoid the
area, making it slightly dimmer than the outsides.
The area is surrounded by the thick obsidian
frame, with silvery words saying:

"Ahtieli the Lich Empress, the one who ended the world"


P.S. I would also make it a insta-death lose-eq deathtrap if you are brave enough to crawl down this :)