Hyaku Ren Jitoku no Kiwami
From Tenipuri Info
Hyaku Ren Jitoku no Kiwami (百錬自得の極み, Hyakuren Jitoku no Kiwami) is an aura and one of the three doors of Muga no Kyouchi.
The user concentrates Muga's energy into a single arm to return shots with double the power and spin. It also minimizes fatigue[1]. However, since Muga's energy no longer extends to the rest of the body, it is best used in combination with a move like Tezuka Zone[2].
Variations
Instead of concentrating Muga's energy in one arm, it is also possible to move it to the legs for increased speed[2].