Object Eraser

The Object Eraser (オブジェクトイレイサー) is a Game Master (GM) tool in Sword Art Online used to remove any object in the game.

Background
The Object Eraser can only be summoned with the use of a GM console with a GM authority account. Once summoned, crimson flames come forth, coiling out of the user's arm until it takes the form of a sword.

Appearance and Abilities
The Object Eraser takes the form of an oversized, flaming, crimson-red greatsword with a purplish cross-guard and pommel, and a dark red grip.

Due to being a GM tool, the sword is capable of destroying any object that it is used against, even if the object is a boss monster that would be impossible to beat. Although the tool's effect is not instant, it only takes mere seconds for even the most durable objects to be destroyed. The tool may also cause the target to be engulfed in a ball of flames before being destroyed.

Morning Dew Girl
After Yui accidentally made contact with the GM console in the safe room of the Hidden Dungeon, she regained her memory and summoned the Object Eraser, which she used to easily defeat the guardian of the dungeon, The Fatal Scythe, which was threatening the lives of Kirito and Asuna.

Trivia

 * A two-handed sword version of the Object Eraser can be acquired in Sword Art Online: Lost Song as possible loot from the "Hunt of the Dragons" quest.

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