Pokemon what? (Legends Z-A(

What if just like legends Arceus where they made a fourth Genie. In Legends Z-A they had a 4th lake spirit? Valkyria. That's what I'll call it. It's Norse based mythical that was lost in centuries and was found hidden below Kalos the whole time and it took eons to discover? That's the only differences with the genie and the lake spirit.