monster

Null-Stalker Enforcer

CR 9

Medium humanoid, Lawful Neutral

Reveal Stat Block

Armor Class

18 (Resonance-Dampening Plate)

Hit Points

135 (18d8 + 54)

Speed

30 ft.

str

dex

con

int

wis

cha

Saves DEX +8, WIS +7

Skills STEALTH +8, PERCEPTION +7, ATHLETICS +7

Damage Resistances force, psychic; bludgeoning, piercing, and slashing from nonmagical attacks

Condition Immunities charmed, frightened

Senses darkvision 60 ft., passive Perception 17

Languages Common, Draconic

Traits

Antimagic Field (1/Day).As a bonus action, the Enforcer can activate an Antimagic Field in a 10-foot radius centered on itself. The field lasts for 1 minute or until the Enforcer is incapacitated.

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

Resonance Senses.The Enforcer can sense the presence and location of any creature that has cast a spell or used a magic item within the last hour, provided the creature is within 120 feet.

Actions

Multiattack.The Enforcer makes two Null-Iron Blade attacks.

Null-Iron Blade.Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) piercing damage. If the target is concentrating on a spell, the saving throw DC to maintain concentration is increased by 5.

Mana-Shackle (Recharge 5-6).The Enforcer targets one creature it can see within 30 feet. The target must succeed on a DC 16 Wisdom saving throw or be magically shackled. While shackled, the creature cannot cast spells or use magic items. The creature can repeat the saving throw at the end of each of its turns.

Null-Stalker Enforcer

Role: Secret Police of the Grand Arcane Bank Location: Kigum

The Null-Stalkers are the invisible fist of the Grand Arcane Bank. While the Arcane Guard handles the public defense of Kigum, the Null-Stalkers are tasked with the "internal stability" of the magical city-state. They do not wear the gleaming armor of traditional knights; instead, they are clad in sleek, charcoal-grey plate made of Null-Iron, a rare material that naturally absorbs and dissipates magical energy.

Their purpose is singular: to hunt down and "liquidate" rogue mages, rogue troubleshooters, and any individuals who become a financial or magical liability to the Bank's interests. They move with the silence of assassins and strike with the overwhelming force of specialized mage-hunters.

Training & Tactics

Null-Stalkers are trained specifically to exploit the weaknesses of the "Kigum-Style" of spellcasting, which relies heavily on high-frequency Aetheric resonance. By activating their internal Antimagic Fields, they can neutralize most spellcasters before they can even utter a verbal component.

Adventure Hook: A high-ranking mage from the Academy has gone missing after investigating the Bank's "Black Budget" records. The party finds her research notes, but soon realizes they are being tracked through the streets of Kigum by a pair of silent, grey-armored figures whose very presence makes the air feel magically "dead."