Heavy Infighting

Gravity Magic: Heavy Infighting (重力魔法『ヘビーインファイト』) is a Gravity Magic spell.

Description
With an open grimoire, the user moves in close to their opponent and rapidly punches them. By manipulating gravity, the user is able to increase the weight and speed of their punches and easily overwhelm their opponent.

Trivia

 * Infighting, or inside-fighting, is a boxing term for getting in close to the opponent.