This is a two-sided pendant made of wood and "silver" (actually aluminum) which gives its wearer the ability to shapeshift between human form and feral, anthro, and intermediate fox forms.

I came up with the idea after reading about some cute TF ideas and ended up inventing an OC named Thomas. As part of the character I thought up this pendant that he wears that enables him to transform. It also changes with him, going from a necklace to a collar as he goes from human to fox.

The fox paw was modified from this stock image but everything else in this design is my own work and belongs to me.