Werebear

Ability Score Increase. Your Constitution Score increases by 1.
Shapechanger. You can use an action to polymorph into a Large Bear-Humanoid hybrid or into a Large Bear, or back into your true form. Your statistics, other than size and AC are the same in each form. Any equipment you are wearing or carrying isn't transformed. You revert back to your true form if you die.
Bear-Humanoid Hybrid Form & Bear Form. Your size is Medium. You have natural armour equal to 11 + Constitution Modifier. You gain a climb speed of 30ft. You gain the Bite attack and are considered proficient: Melee Weapon Attack, one target, 1d8+Strength piercing damage. If the target is a humanoid, it must succeed on a DC 10 + Constitution Modifier, Constitution Saving Throw or be cursed with werebear lycanthropy. You gain the Claw attack and are considered proficient: Melee Weapon Attack, one target, 2d4+Strength slashing damage.