What do the following have to do with each other?

*Tomb of Xandes I (per Cid questline, located at the great underground Aetheryte with the symbol of Thaliak, the Scholar. Located Southwest of the lake.)
*[Powerful energy signature] (Lore discussed by Erik in Ul'dah, the same NPC who you speak to for Monk quests. Located EAST of the lake.)
*[Seal broken by Ceruleum explosion] (1.0 Intro movie depicting an echo of the Battle over Silvertear Falls depicts a cataclysmic crash which broke the seal in the lake, both releasing Primals and decimating Mor Dhona. Allegedly dead center of the lake, where Midgarsormr resides in 1.0)
*Crystal Tower (Only visible reference has it piercing the clouds as seen from a cliffside with Behemoth. Is it also in Mor Dhona?)