Cultist of Khorne

Dark Devotion. The cultist has advantage on saving throws against being charmed or frightened. Additionally the cultists Eldritch blast is always under the effects of the Warlocks Agonizing Blast. (1D10+3 per beam)

Let Live The Faithfull. Allies of the cultist are immune to all spell effects and damage that would be dealt by the casting cultist. Additionally the cultist is always under the effects of Mage Armor

Scimitar. Melee Weapon Attack: +3 to hit, reach 5 ft., one creature. Hit: 4 (1d6) slashing damage.

Spellcasting. The Cultist is a 5th level caster. Its spell casting modifier is charisma (spell save DC 14, +6 to hit with spell attacks.)

Cantrips (At Will) Eldritch Blast, Mage Hand, Chill Touch

1st level (4 slots)  Command, Chaos Bolt, Burning Hands, Disguise Self

2nd level (3 slots) Hold Person, Scorching Ray, Mirror Image, Darkness

3rd level (2 slots) Bestow Curse, Fireball, Slow, Pulse Wave

My Life For Slaughter. When the cultist is below half HP they may ritually sacrifice themselves in the heat of battle, doing so creates a portal within their corpse. Summon Lesser Demons is cast, this effect cannot be Counterspelled and only ends when all demons have exited the body or when Dispel Magic is cast on the corpse.

Shield of Wrath. (Recharge 5-6) When the cultist is hit with a melee weapon attack they may use their reaction to gain temp HP equal to half the damage dealt until. Additionally the attacking creature must make a Dexterity saving throw taking 3d10 necrotic damage, half as much on a successful save.