Bone-sculpt Song

Clutching the bone talisman, you sing, hum, or chant the necessary incantations while touching a section of bone, shell, or carapace no more than 5 feet in any dimension (size medium or smaller)  to form it into any shape that suits your purpose. So, for example, you could shape a larger bone into a weapon or idol. Using this spell, it is possible to treat the bone as clay, and take multiple pieces of bone, shell, or carapace to create armor, a small chest, or other items and fit them perfectly into a cohesive piece, or fit them exactly to a wearer, outfit, or weapon as decoration. 

This spell cannot shape wood, but can affect marine shells such as corals, seashells, and carapace of most crustaceans.