Count Lachlan of Ogham and the Cemetary of the Eternals

Una remembers the count's signet ring being burried in "our ancient graveyard." This implies that the ring was burried there prior to the Eternal conquest, but this cannot be, as Lachlan was killed in that conflict. Furthermore, his grave is integrated into the Eternal Cemetary and seems to match with the Eternal style surrounding it, perhaps as a trophy to memorialize Draven's victory.

In fact, it is not clear to me why so much emphasis is placed on the Eternal Cemetary being built over an Ezomyte graveyard, as we do not see or interact with any remnants from that period.