Amulet of Angua von Uberwald

Requires Attunement
The amulet has an illusory image of a woman
inside of it, but at just the right angle, an image
of a beast can be seen instead, for only a brief
moment. This amulet can change size and shape
to fit as it's wearer shapeshifts into different
forms. While shapeshifted, once per turn when
you deal damage to an object or creature, you can
add 1d8 to the damage you deal, of the same type
as the original attack.