Cadmus Aridion

Avid Drinker. Cadmus has an advantage on saving throws against being poisoned by alcohol.

Demonic Cunning. Cadmus has an advantage on Deception and Persuasion checks against any non-fiend with a lower Intelligence score than him.

Infernal Weakness. Cadmus can't enter any are with consecrated groud or an area under the effect of the hallow spell. When he touches holy water he takes 1d10 radiant damage. 

Innate Spellcasting. Cadmus' spellcasting ability is Intelligence (spell save DC 18, +6 to hit with spell attacks). He can innately cast the following spells requiring no material components.
At will: vicious mockery, counterspell, ray of enfeeblement
1/day each: suggestion, fireball, hold person

Sneak Attack. Once per turn, Cadmus can deal an extra 10d6 damage to one creature he hits with an attack if he has advantage on the attack roll. The attack must use a finesse or a ranged weapon. Cadmus doesn't need advantage on the attack roll if another enemy of him is within 5 feet of it, that enemy isn't incapacitated and Cadmus doesn't have disadvantage on the attack roll.

Special Equipment. Cadmus wears a cloak of elvenkind and carries a bag of holding

Spellcasting. Cadmus is a 4rd level caster and uses Intelligence as his spellcasting ability (spell save DC 18, +6 to hit with spell attacks). Cadmus can cast the following wizard spells. He regains spent spell slots after a long rest.
Cantrips (At Will): mage hand, friends, minor illusion
1st Level (4 slots): charm person, detect magic, disguise self, silent image, sleep
2nd Level (3 slots): invisibility, knock, shadow blade, Tasha's mind whip
3rd Level (3 slots): glyph of warding, major image, sending
4th Level (1 slot): dimension door

Multiattack. Cadmus makes two flamebolt attacks or two talon attacks. 

Talons. Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 7 (2d4 + 2) slashing damage. 

Flamebolt. Ranged Weapon Attack: +5 to hit, range 80/160 ft., 1 target. Hit: 12 (2d8 + 3) fire damage.

Longsword. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 5) slashing damage. 

Demonic Alertness. Cadmus can take a bonus action to use the Dodge action.

Flame Bend. When an attack dealing fire damage misses Cadmus, or if he succeeds on a saving throw against an effect dealing fire damage, he can deflect the effect at a creature he can see. He can only deflect fire damage, for example, if an effect dealing fire and slashing damage misses him, he can only deflect the fire damage.