Pata-Elemental Theory

More detailed description to come soon...
This extension to "Para-Elemental Theory" includes the five energies (Force, Thunder, Acid, Poison, and Psychic) that occur in spell damage types and draconic breath weapons that are not a part of the original eight, as well as the triad of "Physical" damage types in opposition to Psychic. It was originally hypothesized by Audrarith during her time powering the arcane engine at Windcrest, and first put to practical use in Kylyndaar's permanent transformation into a dragon via True Polymorph
See this geometric illustration.
Upon the discovery of Zedaar Ravomorn's draconification not matching any known dragon types, but instead seemingly a new gem-like type of obsidian, Audrarith went down a rabbit hole based on this theory, coming up with a proposal for three missing dragon types in each of the three extant families. These types' elemental affinities would create a "symmetry" within the theory's geometric construct for each of the families, which would be magically balanced and conceptually pleasing, and thus very favorable for a theoretician like Audrarith.