The Light Sword is a ki technique used by Future Trunks in which the user creates a sword of ki over their broken sword.
Future Trunks uses this technique by putting golden energy over his broken sword in the shape of an actual sword.
- Spirit Bomb Sword - A far more powerful version of this sword created by infusing it with a Spirit Bomb.
Video Game Appearances
This technique was named in Dragon Ball Fusions
As part of the 1.07.00 Update in Xenoverse 2, the Light Sword makes a minor appearance when the Sword of Hope Ultimate Skill is activated by either Future Trunks or the Future Warrior, they will draw their Light Sword briefly before infusing it with the energy of a Spirit Bomb to create the Sword of Hope which they wield as part of the Sword of Hope Ultimate Skill. The Light Sword's appearance in the game is basically little more than a visual cameo in Xenoverse 2.