You are cursed with arouranthropy, the curse of the werebat, granting you the following features:

BLOOD DRINKER

Whenever you finish a long rest without consuming at least 1 pint of blood, you become exhausted, which can't be removed in any way except by consuming 1 pint of blood.

SHAPECHANGE

You can take the Magic action to transform into your Animal Form, Hybrid Form, or back into your humanoid form.

ANIMAL FORM

You transform into a bat. While transformed by this feature, you are impaired.

HYBRID FORM

You transform into a werebat. While transformed by this feature, you are impaired, and you gain the following features:

ABILITY SCORE IMPROVEMENT

Your Dexterity scores becomes 17, provided it isn't already 17 or higher.

CURSED BLOOD

When you take the Attack action while unarmed and hit a humanoid creature, the target must make a Constitution saving throw against your Constitution DC. On a failed save, the target becomes becomes cursed with arouranthropy (wererat). On a successful save, the target becomes immune to the effects of this feature for 24 hours.

ECHOLOCATION

You have blindsight (60 feet), provided you are not deafened.

KEEN HEARING

You have proficiency in the Perception skill, and advantage on Wisdom (Perception) checks that rely on hearing.

NATURAL WEAPONS

While unarmed, you can take the Attack action with your bite (1d6 piercing) and claws (2d4 slashing).

PHYSICAL IMMUNITY

You have immunity to bludgeoning, piercing, and slashing damage from non-silver weapons.

SUNLIGHT SENSITIVITY

You are debilitated (sight) and exposed while in sunlight.

MOONLIGHT SENSITIVITY

While under the moonlight of a full moon, you gain the following features.

BLOODBOIL RAMPAGE

You unwilling transform using your Hybrid Form feature at the start of your turn that lasts until you are no longer under moonlight of a full moon. If it is a red moon, you also start raging for the duration, and you become mad.

FERAL TRANSFORMATION

When you take the Attack action while unarmed, you have a +1 bonus to the attack and damage rolls. If it is a red moon, the target makes the saving throw of your Cursed Blood feature with disadvantage.

LUNAR BLESSINGS

You gain temporary hit points equal to your proficiency bonus at the start of your turn that lasts until you are no longer under moonlight of a full moon. If it is a red moon, you gain one Therian Feat option of your choice for the duration.