Your Strength score increases by 2, and your Constitution and Charisma scores increase by 1.

Oni reach adulthood by the age of 5 years old. Oni can live a long life if they don’t meet an early end. They live up to 100 or so years and then succumb to old age.

Oni stood at around 10 feet (3 meters) tall and weighed 700 pounds (320 kilograms). Your size is Large.

Your base walking and flying speed is 30 feet.

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

You can cast darkness and invisibility an unlimited number of times with this trait. You can also cast  charm person, cone of cold, gaseous form, and sleep one time each with this trait, and you regain the ability to cast it this way when you finish a long rest. Charisma is your spellcasting ability for these spells.

Your clawed hands are a melee weapon, which you can use to make unarmed strikes. If you hit with it, you deal slashing damage equal to 1d8 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike. Once on each of your turns when you attack with a claw using the Attack action, you can make one additional claw attack as part of the same action. Your claw attacks are considered magical.

You can use your action to polymorph into a Small or Medium humanoid, into a Large giant, or back into your true form and can use your bonus action to drop it. Your statistics are the same in each form. Any equipment you're wearing or carrying isn’t transformed. If you drop to 0 hit points you revert to your true form.

You regain 10 hit points at the start of your turn if you have at least 1 hit point.

You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift. Additionally, you ignore the Two-handed and Heavy properties of humanoid sized weaponry.

You can speak, read, and write Common and Giant.