Conquest, the Rider on the White Horse

Aura of Domination. Any creature hostile to Conquest that starts its turn within 60 feet of him must make a DC 23 Wisdom saving throw, unless Conquest is incapacitated. On a failed save, the creature is charmed and compelled to obey Conquest's commands for 1 minute or until Conquest harms it, another creature uses an action to shake the creature out of its stupor, or the creature takes damage from any source.

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

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

Magic Weapons. Conquest's weapon attacks are magical.

Multiattack. Conquest makes three attacks with his flaming longsword.

Flaming Longsword. Melee Weapon Attack: +18 to hit, reach 10 ft., one target. Hit: 24 (4d6 + 10) slashing damage plus 14 (4d6) fire damage.

Charge of Conquest (Recharge 5-6). Conquest moves up to his speed in a straight line and can make a Flaming Longsword attack against any creature he moves adjacent to during this movement. Each creature hit by this attack must make a DC 23 Strength saving throw or be knocked prone.

Conquest 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. Conquest regains spent legendary actions at the start of his turn.

• Blinding Radiance. Conquest emits a blinding burst of light. Each creature within 30 feet of Conquest must make a DC 23 Constitution saving throw or be blinded until the end of their next turn.

• Charge of Conquest (Costs 2 Actions). Conquest uses his Charge of Conquest ability.

• Summon Spectral Horseman (Costs 3 Actions). Conquest summons a spectral horseman to aid him in battle. The spectral horseman appears within 60 feet of Conquest and can immediately take one Flaming Longsword attack. The spectral horseman remains for 1 minute or until Conquest dismisses it as a bonus action

Shared Ability: Apocalyptic Convergence:

• Description: When all four Horsemen of the Apocalypse are present on the battlefield, they can channel their combined power to unleash a devastating cataclysmic event.
• Activation: All four Horsemen must use their action on their turn to channel their energy into the convergence.
• Effect: A dark rift tears open in the sky, unleashing torrents of chaotic energy that ravage the battlefield. All creatures within a 300-foot radius of the convergence point must make a DC 25 Dexterity saving throw, taking 100 (20d10) force damage and 100 (20d10) necrotic damage on a failed save, or half as much damage on a successful one. Structures and objects in the area are also affected, taking double damage.
• Duration: The effects of the Apocalyptic Convergence persist for 1 minute, during which time the area is engulfed in darkness and filled with swirling energy that makes movement difficult. Any creature attempting to move within the area must succeed on a DC 20 Strength saving throw or be pushed back 10 feet.
• Recharge: Once the Apocalyptic Convergence has been used, it cannot be used again until all four Horsemen have been defeated and then summoned anew through powerful rituals or divine intervention.