Item from Overlord by Kugane Maruyama
Two hundred game-breaking artifacts from YGGDRASIL — 'Balance Breakers' that override normal rules, grant Wild Magic immunity, and can only be countered by other World Items.
World Items are YGGDRASIL's ultimate tier — 200 artifacts that ignore the normal rules of magic. They grant immunity to Wild Magic in the New World, can only be countered by other World Items, and range from 'merely' devastating to reality-altering. 'The Twenty' are one-use items of cosmic power: Longinus permanently deletes any target (including the user), Ouroboros rewrites game rules, and World Savior scales from weakest to strongest item depending on accumulated power. Ainz Ooal Gown possesses 11 World Items — the next highest guild had 3. This disparity is why Nazarick is effectively unassailable by any force in the New World that doesn't possess one.
Varies enormously — from the Throne of Kings (a chair) to Ginnungagap (Albedo's battle-axe) to abstract items like Longinus (permanent deletion) and Ouroboros (rule rewriting). Their only common trait is overwhelming power.
Also known as: World Items, Balance Breakers