All-Purpose Weapon

You can use a bonus action to mentally command this simple looking copper ring to transform into any melee weapon or shield with which your are proficient. You can choose which form the item takes each time you create it (see the "Equipment" chapter in the Player's Handbook for the shield or a list of weapons). If used as a weapon, it counts as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage, but does not confer a bonus to attack or damage. If used as a shield, the item confers the shield's normal bonus to AC, but it does not add a magical bonus to armor class.

If it is dropped or thrown, the weapon or shield disappears at the beginning of the wearer's next turn. It also disappears if the transformation is dismissed (no action required), or if the wearer dies. No matter how it disappears, the item immediately reappears back on the user's finger.

Notes: Jewelry, transmutation