Miraculous Ladybug new underwater - aqua transformation
In episode Syren we saw new temporary transformation for Ladybug and Cat Noir. They got water powers and new costumes. Something being fed to kwami when the transformation activated. In the end of the episode we saw 7 macaroons and 7 colored pieces of cheese for Tikky and Plagg, so we will have 7 new transformations (including underwater)!