The Curse of Sekolah

Consuming the spirit of the Maw of Sekolah and meddling in the affairs of gods has granted you a blessing, or curse, depending on your perspective. Extra rows of sharklike teeth grow within your mouth and your skin begins to take on a rough, sandpaper-like texture of sharkskin. You gain the following traits:

Blood Frenzy

When biting another creature, when a creature in combat you can see drops below half their hit points, or when you are revived from death you must make a DC 13 Constitution saving throw, which you may choose to fail. On a failure, until the end of your next turn you gain Blood Frenzy, and are compelled to bite a random creature within movement range. This ability can only trigger once per 30 seconds (5 rounds of combat). If you have already taken a bite attack this turn, this ability triggers at the start of your next turn. You gain the following traits:

• For one turn, you must spend your actions and bonus actions to make Bite attacks against the target of your bloodlust.
• You gain movement equal to your walking speed, which can only be used to charge your target.
• Until the end of your next turn, you gain advantage on melee and ranged attacks, and any melee attacks made against you by creatures with less than half their hit points remaining are made at disadvantage.
• Your Bite attacks deal 2d10+4 slashing damage.

Wereshark Lycanthropy

You are cursed with wereshark lycanthropy. If a creature you bite is humanoid, it must make succeed on a Constitution saving throw (DC 10 + your Proficiency Bonus) or be cursed with wereshark lycanthropy. If a creature you bite gains the curse, you are compelled by the spirit of Sekolah to kill them to prevent the curse from spreading, as if you are under the effects of the geas spell.

Shapechanger

As a wereshark, you can use your action to transform into a shark-humanoid hybrid or into a hunter shark, or back into your true humanoid form. Your statistics, other than Strength and AC, are the same in each form. Any equipment you are wearing or carrying isn't transformed. You revert to your true form if you die. On a full moon you are forced to transform into your hybrid or shark form, and all creatures except other sharks and worshippers of Sekolah are treated as enemies.

While in shark or hybrid form:

• You gain a Strength of 18 if your score isn't already higher, and a +1 bonus to AC (from natural armour).
• Attack and damage rolls for your bite are based on Strength.
• You gain the Amphibious and Water Breathing traits.

While in shark form:

• You cannot speak.
• You gain blindsight out to 30 ft.