World Item

World Class Items (世界級アイテム, Sekaikyū Aitemu) or World Item (ワールドアイテム, Wārudoaitemu) are the most powerful and legendary items in YGGDRASIL.

Overview
In all of YGGDRASIL, there were only 200 World class items.

Each of them had their own unique ability, and some were powerful enough to destroy the game's balance. Of course, not all of the World class items had such game-breaking abilities. Even so, if a player managed to get hold a World class item, that player's reputation in Yggdrasil would jump to the highest level. Effects of a world class item can be resisted in only two ways : (1) Owning another world class item. (2) Getting special classes.

Twenty
"Twenty" is the name of 20 world class items that are unrivalled in terms of power. All of them could only be used once. If one needs to use it again, one should find the item all over again, regardless of difficulty of the process.
 * Longinus: has the power to completely remove any target from existence at the expense of the user's own existence. This removal can only be reverted by using another special world class item.


 * Ahura Mazda: has massive effects to anyone with evil karma. It can even change the world.


 * Five Elements Overcoming: has the power to change the magic systems of YGGDRASIL.


 * Ouroboros: has the power to alter YGGDRASI's game mechanism, in more various ways than Five Elements Overcoming. It once prevented Ainz Ooal Gown guild members from entering a certain area.


 * World Savior: A club-shaped item. Very weak in its initiatory stage, but gets stronger with time. It can become so strong that it can even conquer Nazarick with all the members of Ainz Ooal Gown.


 * Caloric Stone: Exact power is unknown. Can only be gained by using massive amounts of rare metal from seven hidden mines. One belonged to Ainz Ooal Gown. Guild member Nubo proposed to make invincible golems using this item.

Other World Class Item

 * Downfall of Castle and Country: the user can mind control even those with absolute mental resistances.


 * Avarice and Generous: A gauntlet, one side looks like devil's hand while the other side looks like that of angels. Given to Mare from treasury.


 * Grail of Hygieia: Unknown. Given to Demiurge or Cocytus from treasury.


 * Billion Blades: Unknown. Given to Demiurge or Cocytus from treasury.


 * Picture of Nature and Nation: Big scroll, given to Aura from treasury. Has a power to isolate object to different dimension.


 * True Nought, Ginnungagap: World class item of Albedo. Seems it can be used to destroy large area. Tabula gave it to Albedo without permission.


 * Atlas: Unknown, once it belonged Ainz Ooal Gown, but other guild stole it so it does not exist in treasury anymore.

Unnamed World Class Item

 * World class item that summon devils: An item that summons endless legion of very strong demons, making a lot of trouble in Yggdrasil. Also not known it is one of "Twenty" or not.


 * Other world class item in the throne hall: unknown


 * Ainz's world class item: unknown. If Ainz activates this item, he will lose some levels.


 * World class item from the 8th floor: Unknown, once it belonged to a female NPC in the 8th floor. Now the item is given to shalltear.

Trivia

 * Ainz Ooal Gown has 11 world class items.
 * Five Elements Overcoming means overcoming relationships among five elemnts in Taoism. "Gogyosoukoku" in japanese pronunciation.
 * Downfall of Castle and Country means means really beautiful woman who can make even a country to fall, like Helen in Trojan war. "Keiseikeikoku" in japanese pronunciation.
 * Picture of Nature and Nation refers Chinese legend that a man go into the picture and live in there.
 * According to the game lore of YGGDRASIL the World Class Items are made from the remains of fallen leaves from the World Tree.
 * The World Class Items are the only one power that can override 「Wish Upon a Star」’s magic.