In Super, Future Trunks carries a new blade that he uses throughout the "Future" Trunks Saga. This new blade played a vital role in his final battle with the Fused Zamasu, where it transforms into a great sword from the ki energy he received from the remaining people of Earth.

Where did Trunks get his sword from?

Tapion possesses a sword that looks curiously like the one carried by Trunks' future counterpart. Over the course of the movie, Tapion and Trunks develop a bond, and after Hirudegarn's defeat, Tapion gives the sword to Trunks.

What type of sword does Trunks use?

The Brave Sword (ブレイブソード, Bureibu Sōdo) is an enchanted sword owned by Tapion during the events of Dragon Ball Z: Wrath of the Dragon. This blade is given to Trunks at the end of the movie, and later used in the Dragon Ball GT opening.