Blight Commander

Limbo-borne: When killed, they simply return to the limbo, leaving large chunks of goop behind. 

Favoured Enemy: The blight has advantage on attack rolls on earthen-based creatures.

Legionnaire: Whenever a blight is within 5ft of this commander, they have +2 AC.

Slash: +3 to hit, deals 2d4+2 slashing damage. 

Embolden: Give a creature (including self) 1d4 Temp HP and 1d4 AC.

Gladius. +4 to hit,  2d12+2 slashing damage. If the target has been the target of its drain effect within the last combat round, they take that drain damage again. 

Drain. (Ranged Spell attack that counts as a 3rd level spell) A target within 30ft makes a DC 16 CON Save. On a fail, they take 2d10 fire damage, which the Blight regains as HP.

Has 3 legendary reactions, that they regain whenever they enter combat. 

Unparallelled Parry:

• When they are attacked by a melee attack, they can completely negate it.
• When attacked by a ranged attack, they can completely negate it.
• When they are attacked by a melee spell attack, they instead transfer the magic into their weapon. Roll a d6. On a 1, the weapon is destroyed.
• When attacked by a ranged spell attack, the damage and effects can be completely negated. If the Blight wants, it can be reflected towards a target within 30ft.