Considering that this is seeming more and more like Strange is going to have to get off his horse, he does so, taking care not to drop the gem in the process. All Strange knows about unicorns is through fairy tales and folklore so alright big monster hunter, he'll take your advice.

"I'll need to spin it in order for the music to play. I believe the ground is level enough for me to do so, but part of the enchantment lets me spin the gem in my hand." Though, considering that the thing did have blood on it's horns, Strange can already see where Lambert's train of thought is going.

"I've mastered turning my entire body to smoke, by the way. I don't mind if I have to stand in the open for the magic to work."