pinki sprunki

idk if you've played chaos;head (or watched it, I never saw it so idk if it's in the anime) but it's set in the same world as steins;gate (which I've watched but never played) and things the eyes see but the brain doesn't process are a literal plot point, you could almost certainly make a fairly lore accurate manip with that if you like this world.

He pushed against the seal, using his mana to separate from his clone, but it was like he was buried in concrete. He couldn’t project his mana even a centimeter beyond his skin. It was even more difficult than performing his workout, but this was precisely what he wanted. Saimallah said that he and his fellow monks used these headbands to train their projection abilities, and there was no better way than this. As he struggled and strained, the seal began to give, ever so slightly, feeling less like concrete and more like rubber.

His wings were aching and threatening to snap, but he forced himself to his feet and returned to the sky. He took after Ingram, once again attacking him from behind. The two of them crashed atop the edge of the arena, overlooking the crowds. It was little more than a cement lip encircling the arena, offering some protection from the sun and the weather. The two got to their feet, both bruised and exhausted, with the spectators cheering as they spotted the combatants overhead.