No!

You know better than to take deals from strangers, and even more so imps wandering a magical forest.

You decline the imp's offer.

"Okay miss," He shrugs and reaches into his pouch. You hear ruffling and bits of metal clinking against one another before he pulls out a small iron whistle and hands it to you.

"If you change your mind, my offer still stands"

With the whistle in your hands, you watch as the imp disappears in a burst of flame and smoke.