fate enkidu

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 conjured a gas mask and metal canister from his ring, alchemically-formed, as was the carbon monoxide within. Any time the two brothers separated, Noah would creep up beside Falco and spray him with the gas. Odorless and colorless, Falco was completely unaware, mistaking the air on his face for the wind, with Noah using his mana to conceal the sound of the gas being released. It wouldn’t leave lasting damage, nor was it a threat to the crowds, but the more Falco breathed it in, the weaker he became.

Noah started with one finger, sending his mana surging through the muscle fibers, and soon could lift it. He could still feel the headband trying to restrict him, but now he could push back. He did the same to his other fingers, soon gaining full control of his hand. The effort required was considerable, but this manner of controlling his mana was not dissimilar to how he could control his clone. Rather than something he would wear like a disguise, he simply had to think of his clone as something that existed within him, under his skin.