Homebrew Half-Oni Species Details

The half-oni, also known as hanyo (meaning "half-demon"), is a mixture of a human and the oni yōkai either by birth or by unnatural means. The first recordings of an oni hanyo was named Kidōmaru, the son of Shuten Dōji and a human woman. Although part human, Kidōmaru was treated poorly by humans from his village for carrying the blood of a yōkai. When his mother passed away, he went to live with his father, king of the oni up in the mountains. When Kidōmaru’s father was slain by a knight, he tried to avenge his father’s death by killing that man. He concealed himself inside of a cow's corpse, planning to ambush his father’s killer but was outwitted and ultimately defeated.

After this, it was many years until reports of oni-like creatures began being sighted amongst the horrible demon-giants. Many assumed they were simply younger oni, being taught by their parents until rumors spread of people being kidnapped and the smaller oni's actually being full-grown half-onis. Since then, groups of half-oni and oni have been the scourge of civilization. After the humiliation Kidōmaru caused the oni, when a half-oni is born, the oni parent typically tries to take the child away and indoctrinate them into their ways.

Half-Oni Traits

Half Giant, and half something else

Powerful Build

You count as one size larger when determining the weight you can push, drag, or lift. This doesn't affect your carrying capacity.

Ability Score Increase

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

Age

Half-oni mature at the same rate as humans, but can live for much longer, often reaching 700 years of age.

Size

Half-oni are built like humans but are much more bulky, tall and weigh excessively more anywhere between 200-400 pounds. Your height ranges from 6 to well over 7 feet in height; your size is Medium.

Speed

Your base walking speed is 30 feet.

Darkvision

Thanks to your orc blood, you have superior vision in dark and dim conditions. 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.

Menacing

You gain proficiency in the Intimidation skill.

Oni-ni-Kanabo

Half-oni carry the sense of “strong beyond strong,” and dislike defeat. When you are reduced to 0 hit points but not killed outright, you can drop to 1 hit point instead. Once you use this trait, you can't use it again until you finish a long rest.

Supernatural Strength

Half-oni have been known to be able to tear even the strongest of Yōkai apart with their raw strength, and are reputed to launch boulders at their opponents without a struggle. When wielding a melee weapon with the heavy or two-handed properties, you can wield the weapon in one hand without ever being able to gain advantage on attacks.

Languages

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