Mareth could feel a flow of magic between the two symbols when she touched them, though it was weak and uncontrolled.  It would link the two girls together, for now, though she could tell that with practice and study, she could make the links much stronger and more stable.  It was obvious, however, that Sylvia could feel something strange as well when Mareth began to thrust into the tiefling, the elf arching her back and letting out a low wail as she felt herself being penetrated.  Infernia, after a few moments, reached down and began to slowly pull the toy out of Sylvia's pussy, eliciting more gasps and moans from the elf - the reason why apparent as the rod moved, as it had several small studs lining its surface.  Both girls reached an orgasm soon after, the combined sensation of the metal rod and Mareth's tail bringing them both to a climax.