First, Gohan and Future Trunks put their hands above their heads and charge their Masenko attacks. Then, they fire them simultaneously so they merge into a large Masenko blast at the opponent, inflicting a huge amount of damage.
Usage and Power
In Dragon Ball Z: Broly - The Legendary Super Saiyan, Gohan and Future Trunks use this attack during the battle against the Legendary Super Saiyan Broly. When Broly dodges Goku and Piccolo's attacks, Gohan and Future Trunks appear and fire the Combined Masenko against Broly. However, it has little effect against the Legendary Super Saiyan, aside from destroying the stone tower he stood on.
Video Game Appearances
In Dragon Ball Z Gaiden: Shin Saiyajin Zetsumetsu Keikaku - Uchū-Hen, Gohan and Future Trunks uses this technique against Giant Form Hatchiyack.