Aspect of Asmodeus

Devil’s Sight. Magical darkness doesn’t impede Asmodeus' darkvision.

Spellcasting. [Aspect of Asmodeus] is a 20th-level spellcaster. Its spellcasting ability is [Intelligence] (spell save DC 26, +16 to hit with spell attacks).He can innately cast the following spells, requiring no material components:
(At will): Fire bolt, Chill touch, Fireball, Darkness, Counterspell, Geas, Hold Monster,  Command, Suggestion
(5 times/day): Antimagic Field, Power Word: Pain, [Tooltip Not Found], 
(4 times/day): Feeblemind, Thunder Step, Power Word Stun
(3 times/day): Finger of Death, [Tooltip Not Found]

Ruby Rod. Ranged Weapon Attack: +14 to hit, 150/600 ft., one target. Hit: 50 (9d8 + 10) fire damage or 51 (10d8+6) lightning damage.

Slam. Melee Attack: +14 to hit, reach 10 ft., one target. Hit: 53 (10d8+8) bludgeoning damage.

Enter the description for how bonus actions work for your monster here.

Reaction Name. Enter the description for your action.

Asmodeus can take 4 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Asmodeus regains spent legendary actions at the start of her turn.

Legendary Action Name (Costs # Actions). Enter the description for your legendary action.

Attack: Asmodeus makes a melee or ranged attack

Geas (Costs 2 Actions). Asmodeus casts the Geas spell.

Spellcasting. Asmodeus can cast an at will spell.

Counterspell (Costs 2 Actions). As a reaction, Asmodeus casts counterspell.