A glass ring (lore)
From Immwiki
The tales are few and sparse, and those that do exist are contradictory and woven with misinformation. The stories speak of the evil enchantress Lilune, who seized some of the Prime Material and hoarded it for her own twisted experimentings. Bending the realities of this plane until they could bear the strain no more, the sorceress was cast down by the Pantheon and her blasphemous creation destroyed. This ring, perhaps, belonged to the evil one, or was made as a testament to her fall. Either way, it possesses a firm place in the stories which speak of the dark happening, a salient constant in a saga of inconsistencies.]