Innate Spellcasting. The oni's innate spellcasting ability is Charisma (spell save DC 13). The oni can innately cast the following spells, requiring no material components:

At will: darkness, invisibility

1/day each: charm person, eldritch blast, gaseous form, sleep

Magic Weapons. The oni's weapon attacks are magical.

Regeneration. The oni regains 10 hit points at the start of its turn if it has at least 1 hit point.

Multiattack. The oni makes two attacks, either with its claws or its glaive.

Claw (Full Form Only). Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage.

Glaive. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) slashing damage, or 9 (1d10 + 4) slashing damage in Small or Medium form.

Disperse. Wxbor magically didides into 5 separate pieces, the right and left arms and legs and the body/head. Each peicenhave their own turn in combat splitting the hp and damage it deals by 5.