Light and Darkness Relationship Compilation

I am fascinated by Ulan-Tan and his Symmetry theory, and what it tells us about the Traveler/Light and the Darkness. I want to make a later post explaining them and their relationship, if it hasn’t been done before and is ok to do.

If it’s not too much to ask for, could some of you please help me find all the relevant lore tabs, grimoire cards, items, etc, that I might need. I know that the lore tabs relating to Ulan-Tan are definitely necessary, but what other ones do I need?