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The name of this item is alternatively translated as Dragonbone Ax (Yen Press)
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The «Dragon Bone Axe» (竜骨の斧, Ryūkotsu no Ono?) is a tool that is carved out of an ancient dragon's bone in Underworld. As an ancient dragon's bone is the highest grade material for weapons available in Underworld, the hardness of the axe is only surpassed by Divine Instrument-class weapons. The villagers of Rulid Village ordered this axe from the capital 300 years before Kirito's first dive into the world in order to have a tool to cut down the «Gigas Cedar», as the blades of normal axes would break and be no longer usable after the first hit on the tree. The axe has a toughness that surpasses iron, allowing it to be used in chopping the equally tough tree. Generation after generation, some villagers would be assigned to cut down the tree using the axe, with Eugeo and Kirito being the last ones to be assigned this Sacred Task.


SAO Weapons Anneal Blade - Dark Repulser - Ebon Dagger - Elucidator - Guilty Thorn - Karakurenai - Lambent Light - Liberator - Mate Chopper - Stout Brand - Sword Breaker - Throwing Pick - Tyrant Dragon - Wind Fleuret
Argyro's Sheet - Blackwyrm Coat - Coat of Midnight - Cor - Crystal Bottle of Kales'Oh - Crystallite Ingot - Crystals - Divine Stone of Returning Soul - Dusk Lizard Hide - Eternal Storage Trinket - Hand Mirror - Mighty Strap of Leather - Mirage Sphere - Pneuma Flower - Potions - Ragout Rabbit's Meat - Ring of Agility - Ring of Angel's Whisper - Scavenge Toad Meat - Tremble Shortcake - Vendor's Carpet - Yui's Heart
ALO Black Iron Great Sword - Blue Long Sword - Crest of Yggdrasil - Demonic Sword Gram - Holy Sword Excalibur - Lightning Hammer Mjölnir - Long Sword - Sap of the World Tree - Yrd
GGO Accuracy International L115A3 - Credit - Defense Field - FN Five-Seven - GE M134 Minigun - Kagemitsu G4 - Metamaterial Optical Camouflage Mantle - PGM Ultima Ratio Hecate II - Plasma Grenade - Procyon SL - Satellite Scan Terminal - Starship Metal Estoc - Type 54 "Black Star"
Project Alicization Black Lily Sword - Blue Rose Sword - Conflagrant Flame Bow - Divine Object - Dragon Bone Axe - Fragrant Olive Sword - Frost Scale Whip - Gigas Cedar - Goblin Sword - Heaven Piercing Sword - Night Sky Sword - Silvery Eternity - Time Piercing Sword - Twin Edged Wings