Nothing at first

It had been two days since you were escorted across the border, through one of the many deliberate weak points in the magical barrier protecting the lands of the Dark Lord that naturally form and disappear.

Although the human lands you were venturing to were known for their great rolling plains, in truth the landscape was as varied as its residents; full of small forests, rivers, lakes, craggy bluffs, and canyons carved out by those same rivers. You'd been outside of the walls of the the Dark Lords keep numerous times - numerous lifetimes in the memories of your hosts, but this was the first time experiencing it for yourself, through human eyes.

You felt exposed in the open sky of the plains, and decided to stick to traveling along a a small stream that fed a surrounding forest for now. You caught fish from the stream on the point of a simple wooden spear you made as you journeyed, so that you didn't break into your dry provisions unnecessarily.

Slowly, a strange sensation was building in you. A kind of lust. Not the lust of your human host, although you felt that too in your stolen body. You were... bored. You wanted to kill something, to corrupt something. To destroy something beautiful. To breed something.

In the keep of the dark lord, you were constantly busy, constantly growing, constantly breeding for experiments, constantly killing for your experiments. Now, though, you were traveling uneventfully. And being in this strong body, fit, fully formed, and ready while doing none of the evil in your nature, the evil that was the very essence of your being... it made you itch.