Aruman's ring

A silver ring of a wolves head with the mouth agape for the finger to slide in. If worn while unattuned, the wearer may at random transform into a hybrid werewolf. If attuned the wearer can choose to once a day at any time, transform transforming back if attuned can be done whenever the wearer pleases but can last up to 12 hrs. If unattuned then the transformation lasts for 1d12 hrs. While in werewolf form your equipment melds into your body and has no effect.

Your STR DEX and CON increase by 2, to a max of 20. Your INT WIS and CHA decrease by 2, to a minimum of 1.

Your AC is 10 plus DEX plus CON. Your movement increases by 10 feet.

You now resist Bludgeoning, Piercing, And Slashing Damage From Nonmagical Weapons That Aren't Silvered. If transformed unwillingly you must make a DC 15 wisdom save or be forced to act hostile. If transformed under a full moon, you take half damage from any source that isn't a silver weapon.

You cannot speak, and the only actions you can take are :  transform back to humanoid form (if attuned).

multi attack: you can make 3 attacks, two with your claws and one with your bite.

Claw: Melee Weapon Attack: str + prof bonus to hit, reach 5 ft., one target. Hit: (1d8 + str bonus) piercing damage.

Bite: Melee Weapon Attack: str + prof bonus to hit, reach 5 ft., one creature. Hit: (2d6 + str bonus) slashing damage.

Notes: Werewolf, transformation, combat, buff, Requires atunement to control, Buff, Combat, Shapechanging