Wind Sword

A brief description of the Wind Sword manga:

This world is filled with evil beasts and demons. But few people know that there is a magical barrier that holds back the strongest and most dangerous of them. There are individuals who want to destroy this barrier and plunge the world into chaos and eternal war. But they are opposed by brave people who are trying to keep it safe. The great battle of good and evil, heroes and villains, is about to begin and will determine the fate of all life!