Brothers against the kingdoms of light and darkness {AU}

In a world where magic and sorcery is punishable by death, A kingdom is divided by light and darkness. In the light kingdom lived Roman and Remus, once best friends and brothers but now they're on opposite sides of a war. After Remus lost his true love at the hands of his own father, he leaves to find the only people who can help him get revenge.

One year later Janus and Remus hire Thomas, Virgil, Joan, and Talyn to destroy the light kingdom by spreading a dangerous disease. Will Roman, Valerie, Logan, Niko, and Patton be able to find the dangerous sorcerers and stop them before it's too late?
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Relationships: we focus mainly on brotherly love but we also have hints of: Anxceit, Logince, ThomasXNiko, TalynXJoan, and my fav Prinxiety
(This was loosely inspired by BBCs Merlin and Disney's descendents.) I don't know how to explain this simply!