This is a punching technique created by Endou Daisuke that even he could not master. It was instead mastered by his grandson, Endou. Daisuke explains the move by writing "Open, grip, tighten and boom!"
This explanation is only true in the game. The user firsts summons a God Hand which will be clenched into a fist.
In the anime, Endou skips the first two instructions and simply starts of by stomping his foot down. This move was used successfully after Endou went for some surfing lessons with Tsunami.
It evolves in G2 to stop Desarm'sGungnir in the match against Epsilon Kai. During the FFI arc, it evolves into G3 to block Joe Jones' Megalodon in the match against Big Waves. Later, in the match against Neo Japan it evolve twice, the first time to stop Gungnir V2 and the second time to stop God Knows Kai.
The user raises their leg and stomps the ground with their foot, closes his fist and spins the arm. A yellow fist comes from behind the user spinning and punches the ball while spinning.
The incomplete variation has the user raising their right hand in air which gets covered in a golden aura. While the hand is still in the air, the user closes their hand into a fist, slides their left foot a little, pulls their fist back, and punches forward. A faint yellow fist comes out but turns into yellow dust due to the move being incomplete at the time.
Manga[]
In the first usage the user must summon a God Hand, then close the hand, stomps the floor and the fist punches the ball. After the user needs only to summon a fist and throw it. (After charging).
Game[]
The user summons a golden God Hand and closes his fist, making the God Hand to close too. Then, he stomps the floor and the fist punches the ball while spinning.