Thalya and Lyra kept walking, stopping from time to time to eat or drink, both of them tried to get used to their changes, with each room they went in, it felt like the musky scent grew stronger, neither of them didn't know if it was a good sign or a bad one, but one thing was certain, it made them both feel slightly more aroused.
Lyra almost felt her new enlarged breasts lactate, she was almost always constantly sweating, and she felt like her clit was about to leak with juices. Meanwhile, Thalya, despite not being affected too much by the arousal due to her determination, still felt the powerful urge to rip her robe open, and stroke her new appendage.
Thalya did try to use a minor spell, to make her and her apprentice feel less... horny. But it barely made a difference, it was a waste of energies to try and stop her and Lyra's desires.
While wandering, Thalya accidentally stepped on a trip wire, that setted off a mechanism, Lyra noticed it, "Thalya! Watch out!" she shouted, however, Thalya was not fast enough to react, and had her skin pierced by a small bolt, it didn't cause a major wound, but it was coated with a special substance, made from the essence of werehorses.
"Thalya! Are you alright?" asked Lyra, with a worried voice, as she headed over to her friend, and carefully removed the bolt, "Yeah, I'm fine." she sighed, as soon as Lyra removed the bolt, and bandaged her wound, Thalya moved on, "Come on, let's cont- Arrgh!" she groaned, falling on her knees, her tailbone ached, it felt like it was morphing, and twisting, "Thalya! Thalya w-what's wrong?!" shouted Lyra again, as she headed over to her master again, whose face was painted by the agony, "My... back! It hurts!" she responded, as it felt like something grew out from her back, slightly ripping her silken robe open. The pain stopped, Thalya looked at her back, and was greeted by a horse tail, swishing from side to side, it was black, almost like her hair, and it seemed really, really fluffy.
Lyra stood there speechless, meanwhile, Thalya ignored her second change, "Come on, let's go." she spoke, still determined to find the treasure. At first, Lyra wanted to let Thalya stay behind her, incase they step in another trap, but she already made her way to the next room, Lyra still following her without question.