Mortal Coil

This ring is composed of hundreds of rose gold wires woven to coil around the finger. While a spectre wears this ring, they can use a bonus action to become completely corporeal. While in this corporeal state, they do not register as undead to any magical effects and can interact with the material world as a typical humanoid. While in a corporeal state, the spectre loses all benefits of their transformation. A spectre can use a bonus action to return to their true form.