Ability Score Increase. Your Constitution score increases by 2.
Size Your size can be Medium or Large.
Speed Your base walking speed is 30 feet. Your base swimming speed is 25 feet.
Darkvision As a creature attuned to the night, you have superior vision in low light. 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.
Claws Your claws are natural weapons. You can use them to make unarmed strikes, dealing 1d6 + your Strength modifier slashing damage on a hit.
Powerful Build You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.
Yokai Resistance You have resistance to poison damage and advantage on saving throws against being poisoned, thanks to your yokai heritage.
Tough at level 1 and every level afterwards you gain 2 additional hit points.
Ability Score Increase: Your Strength score increases by 1.
The Revel Continues: When you are reduced to 0 hit points but not killed outright, you can drop to 1 hit point instead. You can't use this feature again until you finish a long rest.
Fury Unleashed: When you deal damage with a melee weapon attack or unarmed strike, you can choose to enter a state of rage. For the next minute, you gain advantage on Strength checks and saving throws, and you deal an additional 1d6 damage with melee weapon attacks. Once you use this feature, you can't use it again until you finish a long rest.
Ability Score Increase: Your Intelligence score increases by 1.
Oni Techniques: You have access to innate techniques that grow stronger as you do. You know the Lights technique. At 5th level, you can cast Charm Person once per long rest. The saving throw for this spell is against your Special DC.
Artifact Insight: You gain proficiency in the Artifact Knowledge skill. If you are already proficient, you instead gain expertise.
Ability Score Increase: Your Wisdom score increases by 1.
Spirit Walk: Your connection to the spirit world allows you to briefly step through the boundaries between planes. As a bonus action, you can teleport up to 30 feet to an unoccupied space you can see that is shrouded in darkness. Once you use this trait, you can't use it again until you finish a long rest.
Spiritual Awareness: You gain proficiency in the Perception skill. If you are already proficient, you instead gain expertise.