Fourth Ability: Cut!

Lios told me to imagine that my hand is a sharp sword that can cut anything and I need to focus all the Mana throughout my body on my hands, he made me do thousands of up and down vertical hand gesture, at first it mas easy like waving back at someone but after doing hundreds of it, my arm feels like it's going to come off, but every time I wave my hand I feel a little change, my hand is getting stronger and stronger, my fingers feels like stone, and I can see the wind being visible to the naked eye with this up and down hand gesture. After some time, I've finished it and I feel like my arms are hard as stone, but when I touched hand, it feels soft, ' that's Mana overflow ', Union is still here, waiting for me to finish, i thought the she will wonder off or return to my dorm, but what is this Mana overflow?, she stand up and jumped straight to the ring, ' Mana overflow is when you focus all your Mana in one position, that particular skill is need of usage of Mana overflow ', So that's why, so his hands are filled up with Mana?.