PoV Diego
It was surprisingly easy to remove the odd collar, as it didn't hamper any of my draconic abilities. I liquified it a couple of times, and when the guards came to check for it, they looked extremely frustrated; no matter how much they checked, they weren't able to find it. Of course, I also played my part in the confused little lamb; one day I had the collar, the next it had disappeared, and I was just a victim in all of this.
At first, they tightened the security around me, but after seeing that it couldn't stop this odd phenomenon, they began taking blood samples to examine, but it was all useless; everything would have shown them that I was a human, that I was a perfect being for these kinds of situations.