Vampirism, Stage 2 (Shapechanger)

Boon(s):

Shapechanger. You can use an action to polymorph into a Tiny bat or into your normal form. If you have sunlight hypersensitivity, it is reduced to plain sensitivity, and you otherwise have the stats of a bat, excluding your mental stats. Objects merge with your shape. In addition, if you go unconscious while a bat, you turn into red mist. You can use an action to turn into red mist as well. As red mist, you cannot take actions, speak or manipulate objects, you are weightless and have a flying speed of 20 feet, hovering, and if air can fit in a space, you can pass through it. You cannot pass through liquid, or over running water in this form. You have adv on all physical saves and are immune to all nonmagical damage. If you go unconscious as mist, you turn back to your vampire form.

Flaw:
Hideous Appearance. Your appearance has greatly altered from its original features. The first signs were the fangs that started to protrude from your upper row of teeth. You have no reflection in mirrors or other reflective surfaces. With dry, pale skin and occasional burns from the sun, you can hide your true appearance by concentrating on your pre-vampirism appearance. However, the following situations can reveal your true appearance:
• Concentrating on a spell.
• Gaining the unconscious condition.
• Entering hallowed ground.
• Taking damage from being exposed to sunlight or free-flowing water.
• Choosing to reveal your true self. In events of extreme emotional or physical stress, a GM may call for a Constitution saving throw with a DC of their choosing to see if you maintain your humanoid form.