Curse of the Polar Werebear

You have the lycanthropy curse associated with the polar werebear variant. This is an honor generally reserved for the goliath tribes that live north of the Spine of the World.

You gain the following benefits:

• Increase your Strength to 19 if it isn't already.
• +1 to your AC while in hybrid or polar bear form (natural armor)
• Immunity to non-magical bludgeoning, piercing and slashing damage from non-magical attacks that aren't silvered.
• Vulnerability to fire damage.
• Resistance to cold damage.
• Advantage on Perception (Wisdom) checks that rely on smell.
• Your statistics other than your size and AC are the same in each form. (This includes your hit points and hit point maximum)
• While in polar bear form your walking speed increases by 10. Additionally, this bonus is applied to your swim speed after it is halved unless you already have a swim speed equal to or greater than your walking speed. 
• Attack and damage roles for the natural weapons are based on strength.
• You are one size larger in hybrid or bear form. (small becomes medium, medium becomes larger, etc)
• As an action you can shape change, transforming you into either a hybrid of humanoid and polar bear or a full polar bear form. You may also take an action to change back to your humanoid form. Similarly, due to the nature of this feat you can not be affected by the polymorph spell or similar magics that cannot work on shapeshifters. Additionally, any equipment you are wearing or carrying isn’t transformed. You revert to your true form if you die.
• A non-lycanthrope humanoid hit by an attack (usually a bite) that carries the curse of lycanthropy must succeed on a Constitution saving throw (DC 8 + the lycanthrope’s proficiency bonus + the lycanthrope’s Constitution modifier) or be cursed. If the character embraces the curse, their alignment becomes the one defined for the lycanthrope. The DM is free to decide that a change in alignment places the character under DM control until the curse of lycanthropy is removed. Work with them on any additional features that you may want this feat to have. For example they may allow you to have a variation of wildshape or polymorph depending on the nature of the curse.