The Ad Oblivione mentioned by Aranara is what makes them forget so they give 'living memories' to remember Ad Oblivione is related to Wind and the Erosion of Memories and this might be the Erosion that the heavenly principles Imposed to all the creatures of Teyvat
With Azhdaha already been affected by Wind and Water Erosion along with him forgetting Morax due to Erosion of Memories Morax is forced to seal him within the earth. These 3 Erosions might be the 'various erosions' that Azhdaha was subjected to in his Archive Description
The 3rd Erosion is the Erosion of Memories, it is the Erosion that made Azhdaha forget who Morax is and is also the reason why Morax had to seal him because Azhdaha losing his memories endangered the people of Liyue
Zhongli already mentioned Wind and Water Erosions in his 1st SQ, its the Erosions that corrodes rocks overtime which also happens in real life Wind Erosion and Water Erosion might be the reason why Azhdaha was described to be 'disfigured' when he experienced Erosion
There are 3 known types of Erosion in Genshin, Wind Erosion, Water Erosion and Erosion of Memories (which Azhdaha referred to as the Greatest Destroyer of Memories)
IF Zhongli actually is made of Gold then he might not be suffering from Erosion after all, simply because Gold CANNOT be corroded by Wind and Water
With Zhongli's associations with Gold and adding his many Sun symbolisms, does that mean that all of his body parts (Flesh, Muscles, Bones, Heart) and bodily fluids (Blood, Tears) Gold? is Zhongli actually a LIVING GOLD? Not to mention Zhongli's C6 is based on Chrysus the PERSONIFICATION of Gold
Zhongli is the God of Gold who has a 'Golden Form' and used it to mint Mora which is 'Gold' and he calls it his 'flesh and blood' While the Gold Books in Taishan Mansion says that Gold is the Muscles, Bones and Heart of Liyue then Canotila says that Gold is the Tears of the Sun
After the 4.2 Archon Quest, we've unlocked Neuvillette's voicelines about the Archons and confirmed that one of Morax's titles is 'Deus Auri' or God of Gold which was the same 'Golden God' that Orobashi couldn't beat in the Oathsworn Eye lore.
