hugs
Thanks. I honestly don't know what to say.
Regarding Excalibur... I thought it might be a little too obvious. I kind of love Arthurian legends and sprinkle it in as a previous age, and have Brittany as a focal point for that. A sword that can not be removed is often a burden. Excalibur was also considered as the King's Burden, that only the Lady of the lake could relieve him of. (A slant taken on Babylon 5 if I recall)
As well as Merlin being the previous owner of the earth stone- indeed Merlin is actually a title, not a name ;)
On and Avalon... Avalon is special. I think it can be considered one of the constants in every age that has ever existed. Like a sort of focal point? That might be interesting.