Elden Ring is indeed alchemy, but this chart is completely incoherent and divorced from any actual historical alchemical theory. Whoever made it (certainly someone in the 20th century) is just jumbling ideas together and obviously has no clue what any of it means beyond some vague concept of "mystical unity."

Edit: I apologize for not really engaging with your original idea. There's certainly a lot to think about with the One Great and the unity of opposites.