It's all AU.

Exploring was always fun, even when he was doing it alone. Koschei had been crawling through the bushes and grass all morning, pouncing on any bugs that he would find and studying them thoroughly before letting them go again. He'd suppressed the urge to rip them in half more than he'd like to admit in the last few hours. It was an odd feeling, the drums taking over his mind and pushing him to do something. It gave him a terrible headache when he pushed back. Which was why one side of his head was throbbing constantly right now.

But Koschei was ignoring it. He hadn't finished exploring yet.