As big as a person, the Buster Sword is a powerful blade. Fitting for a 1st Class Soldier, it is perfectly balanced, can cut through monsters with ease, and never lose its edge. The sword is also a powerful magic channeler, allowing you to input magic through it to either enhance your blows or to extend your attacks. That said, it weighs close to a hundred pounds, and it doesn't grant you any magical potential or the strength to wield it.
Materia
You now know how to create materia, crystalline orbs that can benefit you in a plethora of ways, to enhance your attributes, allowing you to cast spells, and even summoning gods. The sword itself only come with two slots, but you know how to create slots in other objects to fit any materia.