Master Elemental

The Puff can use magic to conjure elemental materials into permanent, decorative forms that can be placed on or around its body. These elements may orbit, float, or create any kind of visual effects with no strict limitations.

You may use any element(s), in any quantity, and combine/mix them freely.

However, this still does not allow you to actually transform any Puff body parts into those elements.
The tail is the only body part that can be made entirely of the element.