Fiendish Blessing. The AC of the cambion includes its Charisma bonus.

Innate Spellcasting. The cambion’s spellcasting ability is Charisma (spell save DC 15). The cambion can innately cast the following spells, requiring no material components:

3/day each: alter self, command, detect magic

1/day: vitriolic sphere (as a 7th level spell)

Multiattack. The cambion makes two claw attacks or uses its Fire Ray twice 

Claw. Melee Weapon Attack: +8 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 7 (1d6 + 4) slashing damage

Fire Ray. Ranged Spell Attack: +8 to hit, range 120 ft., one target. Hit: 10 (3d6) fire damage.

Acid Breath (Recharge 5-6). The cambion exhales acid in a 15-foot line that is 5 feet wide. Each creature in that line must make a DC 12 Dexterity saving throw, taking 22 (5d8) acid damage on a failed save, or half as much damage on a successful one.

Fiendish Charm. One humanoid the cambion can see within 30 feet of it must succeed on a DC 14 Wisdom saving throw or be magically charmed for 1 day. The charmed target obeys the cambion’s spoken commands. If the target suffers any harm from the cambion or another creature or receives a suicidal command from the cambion, the target can repeat the saving throw, ending the effect on itself on a success. If a target’s saving throw is successful, or if the effect ends for it, the creature is immune to the cambion’s Fiendish Charm for the next 24 hours.