Corundum Magic

Corundum Magic (鋼玉魔法) is a form of magic that allows the user to manipulate corundum.

Description
This form of magic allows the user to generate and manipulate corundum at will. In order to use it to its full potential, specific spells are required, which are stored within grimoires.

Trivia

 * Corundum is a hard rock-forming mineral that is commonly used as an abrasive.