Hey guys, I want to theorize a bit about what a being with the power of one of the Arbiters would be capable of doing.
Authority + Power = Order: According to the wiki, "Order was the power to command all things, to structure all things, to write the laws that govern the universe, and to have both the Power and the Authority to enforce them." This suggests that Order could potentially do what Eisheth can do, but on a much larger scale?
Body + Memory = Evolution: Evolve and devolve others? Maybe capable of modifying beings in a way that makes it impossible to change back?
Time + Ether = Infinity: Thanks to Hex, we know Infinity can create dimensions.
Darkness + Light = Soul: Control souls, revive the dead and insta-death things?
Truth + Fantasy = Paradox: No ideia.
Destruction + Creationg = Chaos: No ideia.
My theories on them
Order: Building off it being made in part of Authority, it would work by issuing commands, but ones that even inanimate objects and forces have to obey. Not reality manipulation, exactly, but issuing decrees about how the world works now that broadly modify the laws of nature. "And God said, 'Let there be light,' and there was light."
Evolution: I feel certain that this is going to be some sort of adaptive transformation. The MC has used Memory to automate his body, the next step is automating how his body transforms. Make it so that the MC evolves constantly, not in the leveling up sense but in adapting to his environment and circumstances. Repeated exposure to a stimulus would lead to his body refining his biology to handle it better and better, allowing him to eventually overcome any obstacle.
Infinity: Yeah, dimensional creation, though I expect the full thing is much better than what Hex can do. Hex can only copy real environments, full Infinity could custom-build its pocket dimensions for whatever it needs. Weapons, resources, minions. Probably also some ability to modify the physics inside the pocket dimensions, at the very least I'd expect the ability to alter space and time within them.
Soul: Something to do with manipulating souls, obviously, but beyond that it's vague. Best idea I have is that it does something with blessings and curses, based on Light being able to empower people and Dark being able to weaken them. Would explain why the Great Lord of the Seahumans had a soul-powered weapon.
Paradox: Probably this is what Henri is doing, and explains his reality-warping powers. Mechanically, it would work by overlaying Fantasies onto the world and then making them real with Truth.
Chaos: Something to do with cycles and rebirth? The memories the MC gets from the chaos flame in the monster temple he can visit indicate that the old world was burned away in the flames of Chaos, setting up the conditions for the beings who did it to one day be reborn. That kind of fits with it being made of Creation and Destruction, too. Destroy to rebuild.