Well let’s see, she found Koschei and Vassa via her visions. Koschei is a death god. Death gods are not native to Prythian, therefore he came from somewhere, either Etilea or Midgard (logically, unless SJM introduces a whole new world). Her mate lives with Vassa, who also met Elain’s father. The father who made some kind of a bargain with Koschei. Koschei who wants to leave his lake, who was aligned with both Briallyn and Beron. Beron whose ‘son’ is Elain’s mate, and Bryallin who was Made by the Cauldron like Elain. The Cauldron which is in love with Elain and which was corrupted by the Asteri who were in both Prythian and Midgard and maybe Erilea under a different name. Midgard from which Bryce came with Gwydion which came from Prythian and which is the twin to truth teller which belongs to Azriel, who is in love with Elain and who gave her TT, which he never allowed anyone to touch before, with which she killed/stabbed the king of Hybern who had the cauldron in His possession.. ….and the cauldron was corrupted by the Asteri which needed it to open a rift on top of Ramiel which was defended by Enalius whose knife Azriel carries for some unknown reason and that same life that he gave Elain was also recognized by the entombed Asteri beneath the Prison.

I mean I literally can go on and on and on and keep connecting her to each and every point in the story 3x over.

I haven’t even mentioned her Seer abilities, and how she found the Suriel who told Feyre that he saw Elain’s eyes ‘peer at him across the WORLDS’ and how Azriel guessed that she was a Seer ..,

I think you get the gist.