@ElderGod-kirky group
The prince froze. He hadn't thought of that, and it was terrifying how plausible it was. It made sense and it chilled Sláine to the bone thinking about it. "Fuck," he whispered, then slipped into tangled and thick Gaelic as his thoughts spiraled down into all sorts of possibilities. "World, doom us, for we will not live to see our next tomorrow under the cover of these sins. Light the lanterns over our graves so that we are not led astray." The plea was instinctual, as the horror of what Eurion suggested struck the prince to the very bone.
Sláine switched back, even if his accent was thicker than normal. "If someone got into the Middle, got to the heart, and somehow got control over it, then that would be bad. Really bad." But not impossible. The prince's family was not the only one with access to that divine plane of existence, they were simply blessed by it and welcomed without contest should they want to slip into that non-world. "The Middle is an entity of its own, sort of. Like a god, but not a being. That means it would fight, but it's not impossible for someone to start messing with the intricacies of things and asserting their own control, if they knew how to."
Maintaining the balance of the worlds and realities stretched across the universe, overlapping one another and drifting through their personal orbits, and only interacting when someone breaks those rules—someone like Sláine and Caoimhe. If someone managed to harness the power of the Middle, they could manipulate anything to be how they wanted it to be.
It may seem hypocritical for him to be horrified by the thought, but the Mac Arthfaels had a deal with the Middle. They harnessed its power, a magic gifted to them, and used it to protect people. They were living vessels of the Middle's goodwill, even if they didn't directly interact with it like Eurion did with the Old Gods. To manipulate such an entity and use it to manipulate things that shouldn't be messed with was a gross violation.