Warning Spoiler Alert: This article or section contains details about plotlines not covered in the anime. Do not proceed unless you wish to be spoiled.

The Time Piercing Sword (時穿剣(じせんけん), Jisenken?) is a Divine Object-class sword used by the Integrity Knight Bercouli Synthesis One.


The Time Piercing Sword is a bulky, slightly blackened, dark-gray blade that has been meticulously polished, though an infinite amount of old blemishes, faintly remaining over its entire length, glitters in illumination. The guard and grip of the sword are made from the same quality metal as the blade, though, unlike the other Divine Object-class weapons, they lack any splendid decoration.


The sword was originally a «System Clock», a device left by the creators of Underworld as a way to tell time for the residents. Like the mechanical clocks in the real world, the clock consisted of a circle, with 12 numbers arranged around it at equal intervals, and a huge needle that pointed at the numbers. The clock was no ordinary clock, as it was linked to the server's clock, thus in a sense, it created the time in Underworld. The sword was formed from the needle of the clock, thus it retained the original's time altering properties.


Due to the sword's inherited time altering properties, once the «armament full control» art is cast, it allows the user to "slash the future" of the immediate future: the sword's force is conserved in a specific place and is unleashed at a specific time, in the form of a powerful heat haze. Due to the nature of this ability, the user must carefully calculate both the time and the place that his opponent will be standing in at a specific time, otherwise, the strike would miss its intended target. 


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

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