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, cone of cold, 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.

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

Can take a weapon from a player, enemy, dead body, or off the ground. The weapon has a +20 to hit and a +75 damage.

Maledictus can gain immunity to the type of damage he was most recently hit by. 

Can cast shield as a reaction