Lycanthropy Curse [Wererat]

You are cursed with wererat lycanthropy, as a result, your Dexterity Score increases by 1 and the additional conditions are applied;

Shapechanger: You can use an action to polymorph into a medium Rat-Humanoid hybrid or into a small Rat, 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.

Lycanthropy Mastery: From player level 1-10, you must succeed on a DC 12 Constitution check to determine if you're successful in shapechanging or not. On success, you can transform into the form of your choice. On a failed check, you must roll a D20 to determine your form., and you are stuck in the form for 1d10-1 hours, or until you complete a long rest, at which time you transform into your true form. Upon reaching level 10, you've mastered shapechanging and no longer need to roll to determine your form.

• No Change: DC 1-5
• Giant Rant: DC 6-10
• Wererat: DC 11-15
• Human: DC 16-20

Lycanthrope Resistance: You gain resistance to Bludgeoning, Piercing, and Slashing from Nonmagical Attacks that aren't Silvered

Rat-Humanoid Hybrid Form:

• Your size is Small.
• You have natural armor equal to 11 + Dexterity Modifier.
• You gain the Bite attack and are considered proficient: Melee Weapon Attack, one target, 1d6+Dexterity piercing damage.
  • If the target is a humanoid, it must succeed on a DC 10 + Constitution Modifier, Constitution Saving Throw or be cursed with wererat lycanthropy.

Multiattack (Hybrid Form Only).  As a bonus action, you can make a bite attack.

Rat Hybrid Form: 

• Your size is tiny.
• You have natural armor equal to 11 + Dexterity Modifier.
• You gain the Bite attack and are considered proficient: Melee Weapon Attack, one target, 1d4+Dexterity piercing damage.
  • If the target is a humanoid, it must succeed on a DC 10 + Constitution Modifier, Constitution Saving Throw or be cursed with wererat lycanthropy.

Keen Smell. While in your Rat-Humanoid Hybrid form, or your Rat form, gain an advantage on Wisdom (Perception) checks that rely on smell.