Lycanthropy, Stage 4 (Savage Instincts)

Savage Instincts. You have developed an unrelenting thirst for bloodshed and carnage. While in your hybrid form, if you hit a creature with an unarmed attack, and it is missing any of its hitpoints, the base damage die is increased to 1d12, if it is not already higher.

Flaw.
Predatory Nature. You have begun to realize the true cost of your transformation. The beast within has gained more control of your body than you have. While you can control it at times you know it cannot be contained forever, and when it breaks free, it will delight in any slaughter it can find. You gain the following features:
• If you can see, hear or smell a helpless creature, you gain disadvantage on all Wisdom saving throws.
• At the beginning of your turn, if you can see, hear or smell a hostile or helpless creature, you must succeed a DC 10 Wisdom saving throw or be transformed into your Hybrid Form. If you succeed this saving throw, you become immune to this effect until dawn.
• Whenever you kill a creature and you are in your Hybrid Form, you cannot transform back into your humanoid form until dawn the next day. Although you can transform into your Kindred Form.