Commander Thorne Bloodbane, "Guardian" of the Veil, Ripper of Veridion

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

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

Stolen Eye of Vecna. The eye has 8 charges. You can use an action and expend 1 or more charges to cast one of the following spells (save DC 18) from it: Clairvoyance (2 charges), Crown of Madness (1 charge), Disintegrate (4 charges), Dominate Monster (5 charges), or Eyebite (4 charges).

Grievous Fighter. When Bloodbane scores a critical hit with Blackrazor he removes one limb. Roll a d10 to determine which limb is severed, 2-10 the target loses an arm or leg, on a 1 the target loses their head. 

Multiattack. Bloodbane makes two attacks with Blackrazor and uses Hollow Void or casts a spell.

Blackrazor, the Voidblade. Melee Weapon Attack: +15 to hit, reach 10 ft., one target. Hit: 26 (3d10 + 9) slashing damage plus 33 (6d10) necrotic damage, and Bloodbane regain 5 hit points.

Hollow Void. Bloodbane summons a hungering rift around a creature it can see within 120 feet of itself. The creature must make a DC 22 Constitution saving throw. On a failed save, the creature takes 49 (11d8) force damage and has the stunned condition until the start of the champion’s next turn. On a successful save, the creature takes half as much damage only. If a creature is reduced to 0 hit points by this effect, the creature dies, and its body crumbles to dust.

Veridions Aegis. After a creature makes a successful attack roll against Bloodbane, Bloodbane may use his Gauntlet to nullify the attack.

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

Induce Violence. Bloodbane targets one creature it can see within 60 feet of himself. The target must succeed on a DC 19 Wisdom saving throw or immediately make one melee weapon attack against another creature of Bloodbane’s choice that is within the target’s reach. If no creature is within the target’s reach or if the target has the incapacitated condition, the target instead takes 11 (2d10) psychic damage.

Fearsome Pursuit. Bloodbane moves up to its speed or commands its mount to move up to its speed.

Attack. Bloodbane makes one Blackrazor attack.

If Bloodbane’s mythic trait is active, it can use the options below as legendary actions, for 1 hour after losing control of the Eye of Vecna or being disarmed of Veridions Aegis.

Ripper's Wail. Bloodbane chooses two targets within 60ft of himself. The targets must succeed on a DC 20 Wisdom saving throw or make an attack against themselves. The targets roll to hit as normal against their own AC.

Soul Reave (Costs 2 Actions). Bloodbane makes a melee attack with Blackrazor at a target within range. If the attack roll exceeds 20 the attack hits.