Special Trait Name.

Ascended Endurance (1/Day). When Aatrox is reduced to 0 hit points but not killed outright, Aatrox can drop to 1 hit point instead.

Blood Magic (3/Day). As a bonus action, Aatrox can heal his wounds for 2d8 + CHA hit points.

Sealed Weapon. Aatrox is proficient in the use of his darkin blade. In order to roam the world, Aatrox uses mortal flesh to sustain his form. The weapon must remain within 10 feet of Aatrox at all times. Without a host, the Darkinʼs consciousness is plunged in darkness, without the ability to see or feel until another mortal attempts to wield them.

Vengeance of the Darkin. When making a melee weapon attack, Aatrox can critically hit on a 19 or 20. When Aatrox critically hits, roll one of the weaponʼs damage dice one additional time and add it to the extra damage of the critical hit.

Spellcasting. The [monster name] is a #-level spellcaster. Its spellcasting ability is [ability score] (spell save DC #, +# to hit with spell attacks). The [monster name] has following [class name] spells prepared:
Cantrips (at will): [spell name], [spell name] 
1st level (# slots): [spell name], [spell name] 

Action Name. 

Infernal Chains. Aatrox smashes the ground and sends out a chain of dark energy from himself in a 15-foot line that is 5 feet wide. Each creature in that line must succeed on a DC 20 Dexterity saving throw. The creature closest to Aatrox that fails the save takes 30 (5d8 + 3) force damage, and is chained to a field of infernal energy that surrounds them in a 10 foot cone. In this field, the creatureʼs movement is halved. If the creature ends their next turn anywhere in the field, they are dragged back to the center and take another 30 (5d8 +3) force damage. Then, the effect ends

Multiattack. Aatrox makes three melee weapon attacks with his sword: a downward swing, a slash, and a downward stab.

Downward Swing. Melee Weapon Attack: +14 to hit (+16 during World Ender), reach 20 ft., one target. Hit: 25 (3d12 + 8) piercing damage (or 3d12 + 10 during World Ender)

Slash. Melee Weapon Attack: +14 to hit (+16 during World Ender), reach 15 ft., three targets in a cone in front of Aatrox. Hit: 30 (4d12 + 8) slashing damage (or 4d12 + 10 during World Ender).

Downward Stab. Melee Weapon Attack: +14 to hit (+16 during World Ender), reach 10 ft., three targets in a 10 ft. radius sphere around Aatrox. Hit: 35 (5d12 + 8) slashing damage (or 5d12 + 10 during World Ender).

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

Reaction Name. Enter the description for your action.

Excepting World Ender, Aatrox can take 3 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. Aatrox gains spent legendary actions at the start of his turn.

Legendary Action Name (Costs # Actions).  World Ender (1/Day). As a bonus action or legendary action, Aatrox can enter World Ender, a state of increased strength, healing, and speed. World Ender lasts for 10 minutes; however, its duration is refreshed another 10 minutes if Aatrox brings another creature to 0 hit points. While in World Ender, Aatrox gains the following features:

• Frightful Presence. Upon activation of World Ender, any creature hostile to Aatrox that starts its turn within 120 feet of him must make a DC 20 Wisdom saving throw. On a failed save, the creature is frightened until the start of its next turn. • Strength. Aatroxʼs Strength score increases to 30 (+10). • Speed. Aatroxʼs speed increases to 60 ft., and he gains a flying (hovering) speed of 40 ft.

• Self-Healing. Once per round, when successfully landing a melee weapon attack, Aatrox can self-heal hit points equal to the damage he inflicted. Deathbringer Stance. Aatrox makes a DC 17 Wisdom (Perception) check about a hostile creatureʼs next move. On success, if the creatureʼs action damages Aatrox, Aatrox takes halved damage.

Umbral Dash. Aatrox moves up to half his speed. Umbral Dash can be used once during a Multiattack as a bonus action. Slash Attack. Aatrox makes a slash attack.

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

Mythic Action Name (Costs # Actions). Enter the description for your mythic action.