Alexios, Slave King

Legendary Resistance (3/Day). If Alexios fails a saving throw, he can choose to succeed instead. 

Innate Spellcasting. Alexios spellcasting ability is wisdom (spell save DC 17). Alexios can innately cast the following spells, requiring no material components:

At will: Firebolt, Dispel Magic, Detect Magic 

3/day: Wall of Fire, Fireball, Dominate Monster 

Magic Resistance. Alexios has advantage on saving throws against spells and other magical effects.

Multiattack. Alexios makes three greatsword attacks.

Greatsword. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 36 (8d6 + 7) slashing damage, and 12 (3d6) fire damage.  

Rock. Ranged Weapon Attack: +11 to hit, range 60/240 ft., one target. Hit: 29 (4d10 + 7) bludgeoning damage, and 8 (2d6) fire damage. 

Alexios 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. Alexios regains spent legendary actions at the start of its turn.

Detect. Alexios makes a Wisdom (Perception) check.

Melee Attack. Alexios can make an attack with his Greatsword

Spell Casting (Cost 2 Actions). Alexios can cast a spell from his spell list