You become a savage predator. You gain the following benefits:

• You gain a Strength of 15 if your score isn't already higher, and a +1 bonus to AC while in wolf or hybrid form (from natural armor). In wolf form, your speed is 40 feet and you can't speak.
• You gain immunity to bludgeoning, piercing, and slashing damage from nonmagical attacks not made with silvered weapons.
• You gain the shapechanger trait and you can use your action to polymorph into a wolf-humanoid hybrid or into a wolf, or back into your true form. Your statistics, other that your AC, are the same in each form. Any equipment you are wearing or carrying isn't transformed. You revert to your true form if you die.
• You gain advantage on Wisdom (Perception) checks that rely on hearing or smell.
• You gain proficiency with the multiattack and claws actions whilst in hybrid form, and the bite action whilst in wolf or hybrid form. Attack and damage rolls for the natural weapons are based on Strength.
• A non-lycanthrope humanoid hit by your bite must succeed on a Constitution saving throw (DC 8 + your proficiency bonus + your Constitution modifier) or be cursed with werewolf lycanthropy.