Netherspark

Medium elemental, neutral evil

Armor Class 15 (natural armor)
Hit Points 90 (12d8 + 36)
Speed 30 ft.

STR	DEX	CON	INT	WIS	CHA
19 (+4)	16 (+3)	16 (+3)	14 (+2)	16 (+3)	14 (+2)

Damage Resistances radiant
Damage Immunities necrotic
Condition Immunities charmed, exhaustion, frightened
Senses darkvision 60 ft., passive Perception 13
Languages Celestial, Common, Draconic, Infernal
Challenge 6 (2,300 XP)

Special Traits

• Magic Resistance. The netherspark has advantage on saving throws against spells and other magic effects.
• Necrotic Aura. Being composed of necrotic energy, a netherspark radiates an aura of such energy in a 10-foot radius. Any creature that’s not an undead that enters or starts its turn within this area takes 7 (2d6) necrotic damage. Undead in the area instead regain 7 (2d6) hit points, up to their maximum hit points at the beginning of each of their turns.

Actions

• Multiattack. The netherspark makes three slam attacks.
• Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) necrotic damage.
• Necrotic Ray. Ranged Weapon Attack: +6 to hit, range 40 ft., one target. Hit: 12 (2d8+3) necrotic damage. Undead take no damage but heal a number of hit points equal to what the ray would otherwise deal.
• Necrotic Burst (Recharge 5-6). A netherspark can release a burst of necrotic energy in a 20-foot radius around it. Creatures in the area must make a DC 13 Constitution saving throw, taking 12 (2d8+3) necrotic damage on a failed save, or half as much damage on a successful one. Undead take no damage but heal a number of hit points equal to what the burst would otherwise deal.

About

This creature looks like a 6-foot-tall humanoid whose form is composed of dark matter. Its head is featureless and sports no eyes, ears, nose, or mouth. It wears no clothes and bands of silver and white crackle and dance in its form.

Nethersparks are natives of the negative energy plane that sometimes find themselves lost in the Material Plane where they seek to transform positive energy into a negative charge. On their home plane, they are attracted to living organisms and seek to transform them into nothingness where both they and their home plane absorb the creature’s positive essence. On the Material Planes, these creatures are often found haunting graveyards or in the employ of a powerful necromancer.

Undead creatures are attracted to and can detect the presence of a netherspark within 60 feet.

A netherspark stands about 6 feet tall and weighs about 180 pounds. Its body is entirely composed of negative energy and dark matter. No facial features are discernable on its head, though the creature can see, hear, and speak.

A netherspark begins combat using its negative energy ray before closing into melee range. In close combat, the creature rains blow after blow down on its adversaries with its powerful fists. The creature continually moves around during combat attempting to expose as many targets as possible to its negative energy aura. A netherspark’s natural weapons are treated as magic weapons for the purpose of overcoming damage reduction.

A netherspark’s natural weapons, as well as any weapon it wields, are treated as evil-aligned for the purpose of overcoming damage reduction.