Spirits are the true platonic concepts they represent and even anime rimuru beat a spirit and controls one. (Spirts ARE what they HOLD)Transcending a true platonic concept = Outerversal
Oka so true dragons are their respective embodiments.And i'm pretty sure we all agree that, that proves true dragons are the aspect of existence they representAnd so basically its a thing called primordial embodiment which is "the ability to become the Primordial Embodiment of a concept or entity. Variation of Transcendent Embodiment and Living Embodiment." Since they are the primordial embodiment of their concept .So this gives them conceptual lordship over their respective embodiment of existence since primordial embodiment says they get conceptual lordship over what they embody but only what they are nothing more."Users become or are a Primordial Embodiment, the living source/entity of a concept. Users can be best described as not being a representative of their concept, but rather they are the concept itself. As such, they are the source of all other embodiments that share their concept; without the user, their concept would cease to exist."Star King Veldanava is the true dragon of the world since that is what he made and is.