Time Cutter is a sword wielded by Fu.
Time Cutter is capable of absorbing energy, it is also capable of Portal Opening through Time Cutter: Black Hole. Through the Double Sword Style: Time Cutter a second blade of energy is used alongside the original Time Cutter.
Video Game Appearances
In Dragon Ball Xenoverse 2, the Fu Set is an accessory consisting of a wig, glasses, and sheathed Time Cutter sword modelled after Fu. This accessory can be obtained as a Raid Reward in certain Raid Quest events. Like most sword-based accessories, the sheathed Time Cutter that comes with the Fu Set is purely cosmetic. Ironically, the Fu Set's accessory description makes no mention of the sword itself just the wig and glasses.