Legend of the Guardians

There once was peace in this world. Seven guardians to protect it and its kingdoms. Everything was perfect, that is, until one day. He came. He destroyed the peace and harmony. He destroyed everything.
The guardians worked together to try and defeat him. But they perished. It is said that in a thousand years that the new guardians will come together and fight off the ever-consuming darkness. The Guardian of the Realms lead the other guardians to a war that we still fight today.
The former fallen guardians were Elenore, the Light guardian, Kage, the Shadow guardian, Eria, the Wind guardian, Aspen, the Nature guardian, Zara, the Water guardian, Liam, the Fire guardian, and Resa, the Guardian of the Realm.
It's about time the new guardians are chosen. But who knew they were high school students?
The new Guardian of the Realm has to find the other guardians when they're transported from their normal lives to this world filled with darkness and creatures looking to kill.