Chaos Eater

Chaos Eater (混沌喰) is an Art used by Orc Disaster Geld and his second-in-commands, the Orc Generals. After the battle against the Orc Army, the only surviving user of Chaos Eater is Geld II.

Abilities
It corrodes everything it touches, using the user's Mystical Aura. Its effect is corroding and decomposing every material it comes in contact with. When the resistance of the target fails to resist the corrosion, the target will most likely perish.

These effects are not limited to just physical damage but affect even the target's spiritual body, which can break the spirit of the target, turning them into a "vegetable" mentally, even if they resist physical attacks or possess strong regenerative powers.

Trivia

 * Rimuru was able to withstand it for hours and even ended up gaining Corrosion Nullification in the meantime.