Quote Originally Posted by Mholito View Post
What parts do you rerun old content in the story? The Guildhests and Qarn run in the 2.1 story could very well have been your first run, since they were previously optional. And the rerun of Titan is explained by the story.
The HW Anima relic weapon questline has you run ten dungeons in sequence. Only the last one, the Vault, is you "recalling" the dungeon run in your mind. Everything else is described in your journal as physically returning to the dungeons to make sure whatever enemies were in there the first time stayed down. Including Nidhogg in the Aery, for some reason.