Asmodeus

Bane of Lujuria: Asmodeus takes 1.5x damage from enemies that originate from Lujuria

Fire Magic Resistance: Asmodeus has advantage against Spells that cause Fire Damage

Sin of Lust: Asmodeus has an aura of sin encoating it causing it to be immune to all forms of damage until removed. If it is removed it loses access to this armor for 48 hours.

Lustful Presence: Every creature that comes within 30 feet of Asmodeus must make a DC 17 Charisma save. 

If they fail they gain the Lusted condition. Which includes all effects of being Charmed, additionally they also cannot attack allies of Asmodeus, they must use their action to attack an ally. The creature will have this condition for one full round of combat, or if they are damaged, they can also remake the save. Once a creature has saved, they cannot be affected for 24 hours. 

**Note on the Lusted Condition: The attack has to meet DMs satisfaction, if it does not the DM will make the attack for the player.

Spellcasting. The Asmodeus is a 9th-level spellcaster. Its spellcasting ability is Constitution (spell save DC 20 +10 to hit with spell attacks). Asmodeus has the following Wizard spells prepared:
Cantrips (at will): Message, Ray of Frost
1st level (4 slots): Long Strider, Fog Cloud

2nd level (3 slots): Gust of Wind, Snillocs Snowball Swarm

3rd level (3 slots): Sleet Storm, Wall of Water,  

4th level (3 slots): Ice Storm, Control Water, Conjure Minor Elements (but will only summon challenge of 1/8th or 1/4th)

5th level (2 slots): Cone of Cold, Control Winds  

Multi Attack: Asmodeus can make up to 3 attacks on its turn, one with its horns and two with its horns.

Horn Attack. Melee Weapon Attack: +12 to hit, reach 5ft., 1 target. Hit: 25 (3d10 + 10) Piercing damage.

Hoof Attack. Melee Weapon Attack: +12 to hit, reach 10 ft., 1 target. Hit: 16 (2d8 + 10) Bludgeoning damage. 

After taking an attack Asmodeus can target the creature that attacked it forcing it to make a Charisma saving throw DC 18

and are Charmed until the end of your next turn

as a result of being charmed by this you roll a D10 

On a 1-3: You must attack an ally

4-8: You can act normally but if you attack Asmodeus you must do so with Disadvantage

9-10: You can move and act normally

Legendary Resistance (3/Day) 

Hoof Attack (Costs 1 Actions). Asmodeus makes a weaker attack with one of its hoofs. If the creature is hit they must also make a DC 13 Charisma save or be Lusted for 1 round. (Attack is instead 2d8 damage with no added modifiers)

Cantrip Attack (Costs 1 Action): Asmodeus can cast 1 Cantrip

Rimefrost Charge (Costs 2 Actions). Asmodeus can charge up to 90 feet in a straight line without provoking opportunity attacks, any creature it goes over, it makes a horn attack against them, dealing 4d10+10 piercing damage

Ice Pillars (Costs 2 Action). Asmodeus can create 5, D6 x 10-foot-tall pillars of ice (30HP) 5 ft around within 60 feet of it. If a creature is on the same space as the pillar, they must make a Dexterity Saving Throw DC 15 or are put on top of it.

Lustful Override (Costs 3 Actions). Asmodeus can cause all enemy creatures within 30 feet of it to make the Lustful Presence Save at DC 17.