Strong Bow

Stone Magic: Strong Bow (石魔法『』) is a Stone Magic spell.

Description
The user creates a larger crossbow that is made stone, that is capable of firing spells from other casters long distances. The crossbow has a larger stone knife attained to the front, six spikes on the bow, and the string is made of mana. The crossbow is so large that the user has to stone to lift it up and adjust its movements.