Kanabō of the Oni

Kanabō of the Oni
Weapon (greatclub), rare (requires attunement)

This magic greatclub counts as a monk weapon.

Change Shape. While the kanabō is on your person, you can use your action to change into an oni-like form. When you transform into this shape, you gain the following characteristics for 1 minute:

• Your height is 10 feet and you weigh 700 pounds. Your size is Large and your creature type is Giant. You can choose to appear more oni-like by growing short ivory horns, jet black fangs or claws, and blue, green, or red skin.
• You gain 2d8 + your character level temporary hit points for the duration.
• Whenever you make a Strength check or saving throw, you can roll one d8 and add the number rolled to the check or save.
• Everything that you are wearing and carrying changes size with you. Any item that you drop returns to normal size at once.
• The kanabō deals 2d8 bludgeoning damage and has the reach property while enlarged.

You can end the transformation as a bonus action, and it ends early if you end your turn and the kanabō is not on your person. Once Change Shape has been used, it cannot be used again until the next dawn.

Legendary Variant:

Kanabō of the Oni
Weapon (greatclub), legendary (requires attunement)

This magic greatclub counts as a monk weapon. You have a +2 bonus to attack and damage rolls made with this magic weapon.

Change Shape. The kanabō has 3 charges, and it regains all expended charges when you finish a long rest. While the kanabō is on your person, you can expend 1 charge to change into an oni-like form as a bonus action. When you transform into this shape, you gain the following characteristics for 10 minutes:

• Your height is 10 feet and you weigh 700 pounds. Your size is Large and your creature type is Giant. You can choose to appear more oni-like by growing short ivory horns, jet black fangs or claws, and blue, green, or red skin.
• You gain 4d8 + your character level temporary hit points. At the start of each of your turns you gain temporary hit points equal to your character level if you have no temporary hit points remaining. If any of these remain when the transformation ends, they are lost.
• Whenever you make a Strength check or saving throw, you can roll 2d8 and add the numbers rolled to the check or save.
• You have a flying speed of 30 feet.
• As a bonus action you and anything you are wearing or carrying can become invisible for the duration of the transformation. The invisibility ends if you attack or cast a spell, or if you choose to end it early (no action required).
• Everything that you are wearing and carrying changes size with you. Any item that you drop returns to normal size at once.
• The kanabō deals 4d8 bludgeoning damage and has the reach property while enlarged.

You can end the transformation as a bonus action, and it ends early if you end your turn and the kanabō is not on your person.

Curse of the Oni. An oni stalks you, enraged that you would use the oni’s power for yourself. It seeks to sow misery in your life from the shadows by killing your close companions, allies, or family. If this cannot be accomplished, it will attempt to undermine your plans by sabotaging your projects or spying on you and sharing vital information with your enemies. The oni may come to you disguised as a potential ally or friend, to ingratiate and embed itself into your life. Eventually, if the oni’s plans are successful and you have suffered, it will finally kill you and destroy the kanabō before vanishing.