Something unexpected happens.

Immediately, sparkling green mist began flowing from the spout of the lamp. Normally, it would have taken Byleth as its genie, but it found a more attractive target, specifically, one inside of Byleth. His eyes widened and he staggered back, but he was way too slow to avoid the tendrils of mist that began to wrap around him.

As he struggled to break through the substance that should not be this solid, much of the mist began flowing right into his chest, coiling right around his unbeating heart, and seeped into the Crest Stone attached to it. 'Hey, what the!?' Byleth heard Sothis shrieking in his head. 'What is... Oh... That actually feels rather nice...' her voice softened into moans.

Byleth stiffened, trying to figure out what in the name of the Goddess was going on. Before he could question much else further, he was suddenly released by the mist, the tendrils in his chest withdrawing. He felt a tug in his very being as the vapor phased out of him... Dragging along Sothis with it.

Byleth stared as she floated before him, her attire changing to more resemble a dancer's, made of translucent green silk, and her lower half was replaced by a sinuous tail made of the same mist. "...what?" he asked flatly.

Sothis was grinning and opened her mouth to answer, before eeping slightly as she was drawn right towards the lamp, and sucked right into it, shrinking down. Byleth, bewildered, picked up a stick and poked the mysterious object, extremely cautious now. "...Sothis?" he asked.

'Yeah, I'm in the lamp now!' her voice rang out through his head, making him jump and look around. 'It's actually quite cozy in here~! And it seems to have left enough of our connection behind when it took me out of you that we can still talk like this!'

"...how do I get you out?" Byleth asked, getting straight to the point as he picked the lamp up, examining it skeptically.

'Just rub it again! Hurry up, I got a lot to tell you!' she said.

Byleth hesitated. She seemed to be under some kind of influence from this strange item. At the same time, it wasn't like he had any other clue what to do in this sort of situation. For all his experience as a mercenary, this was completely foreign territory.