After all the Legendary Pokémon has decided to fuse. Both of your Mistresses Reshiram and Lugia decided to fuse. Creating Lushiram

You get teleported to her chambers and she smirks staring down at you, with her chest jiggling a little.

Lushiram: "Come closer my Servant. We're strong as ever and we want you to witness our power. Don't be shy now~"