D&D 5th Edition Data Explorer

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
spellcasting:
ability:
CHA
dc:
13
spells:
Darkness
usage:
type:
at will
Invisibility
usage:
type:
at will
Charm Person
usage:
times:
1
type:
per day
Cone of Cold
usage:
times:
1
type:
per day
Gaseous Form
usage:
times:
1
type:
per day
Sleep
usage:
times:
1
type:
per day
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.