Correction: There are 10 artifacts. Each of the 5 pillars has 2 artifacts, a positive and a negative (think "ying/yang").
Also, please note that you have the following artifacts in your possession already (held and catalogued by Kahan):
Berillian Brooch
This is one of the ten artifacts from the Kuvlah Tah.
Berillian Brooch, when worn, gives a +3 to all saving throws and
skill checks involving Wisdom, Intelligence, or Charisma.
It may have other magical properties that will be discovered over time.
"Eye of the World" (diamond-like gem.)
Said to have power over time and space.
The "Eye of Tarsek" (long ruby-like gem).
Together the two "eyes" are said to have power over time and space,
but you do not know how they work.
"Scepter of Shi'iki" ("death to life")
In certain circumstances it has the power to bring death back to life.
NOTE: AND YES, THIS MEANS THAT, BECAUSE OF YOUR TIME TRAVEL, THERE ARE TWO OF THESE ARTIFACTS CONCURRENTLY EXISTING IN THIS WORLD.
The Wiki shows you the identity of the artifacts you have discovered so far: http://wiki.rpol.net/?id=11516/Artifacts%20and%20Magic
Note that Borimer wielded the Sword of Chianta/Godslayer, though his elder form no longer carries it.
Borimer is still very confused. "I vaguely remember you all. It is as though in a dream, another life. My memories are anchored to being chained down in that healing water for many decades."
After Zaron hears your complete story, he says, "I don't think that doppleganger creature could have sent him back in time as well as space. That kind of magic is something my master Azaron and Tarimar (who was a student with Azaron) were still trying to master after a century. I think that Borimer is somewhere in our time at his prior age. If we find him, we also find the Sword of Chianta."
(Zaron has never met Borimer, so he is thinking more about the artifacts. To you, of course, Borimer is a good friend who was teleported...somewhere.)
You probe Borimer for what he remembers, but it is though his memory was wiped at the time of his time travel. He barely remembers your faces at all.
Zaron says, "If we find the current Borimer, I don't think this Borimer should come into contact with him. The time dissonance could be disastrous--maybe an explosion, maybe the unraveling of the universe."
Borimer is content to stay among the gnomes to convalesce.
Zaron offers, "I will imprint this place so that we can teleport back here at will. I am not as good at teleportation as Azaron, but I'm getting better."