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

Half-Onis mature at a similar rate to humans but are considered young until they are 60 years of age, and can live into their third or fourth century.

Half-Onis that embrace their parentage are usually evil in alignment, but as they possess free will they can be neutral and sometimes good. Nearly always a Half-Oni is Lawful, and will either follow rules set by his or her mother or father, the rules set by them self or the rules set by society.

Half-Onis are between 7 and 9 feet tall and weigh between 280 and 380 pounds. Your size is Medium

Your base walking speed is 30 feet.

Your Oni blood allows you to tap into a well of Regenerative power within you. You can, as a bonus action, focus on this ability resting within yourself and spend one of your hit die, and regain hit points equal to the number rolled. You can do this once and regain the ability after a long rest.

Your massive and strong Oni parentage allows you to withstand the burden of an ox. As a result of this, you count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.

Oni are accustomed to the dark and have gained the ability to see in it, to find their prey. Half-Onis also gain this trait from their parentage.  You can see in dim light within 30 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 have proficiency in the Deception skill.

your claws are natural weapons, which you can use to make unarmed strikes. If you hit with them, you deal slashing damage equal to 1d4 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike.

You know the frostbite cantrip. When you reach 3rd level, you can cast the disguise self spell once with this trait and regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the invisibility spell once with this trait and regain the ability to do so when you finish a long rest. Charisma is your spellcasting ability for these spells.

You have advantage on saving throws against being charmed.

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