Null Walker

Medium aberration, neutral

A null walker is an anti-magic aberration from the spaces between planes, drawn to concentrations of magical energy the way a predator is drawn to a watering hole. It is vaguely humanoid, featureless, and made of something that looks like solidified static: a flickering grey-white shape that the eye refuses to focus on. Null walkers feed on magical energy, draining enchantments, suppressing spells, and consuming mana. They are not malicious; they are hungry. They are also extremely dangerous to anything that relies on magic to survive.

Armor Class:15

Hit Points:68 (8d8 + 32)

Speed:30 ft

Challenge:CR 4

STR

14 (+2)

DEX

16 (+3)

CON

18 (+4)

INT

6 (-2)

WIS

14 (+2)

CHA

3 (-4)

Saving Throws:CON +7, WIS +5

Damage Resistances:Bludgeoning, piercing, slashing from nonmagical attacks

Damage Immunities:Force, psychic

Condition Immunities:Charmed, frightened

Senses:Blindsight 60 ft (blind beyond), passive Perception 12

Fear Check:DC 13 WIS save when first encountered.

Actions

Multiattack. The Null Walker makes two Disruption Strike attacks.

Disruption Strike. Melee: +6 to hit, reach 5 ft. Hit: 10 (2d6 + 3) bludgeoning damage plus 7 (2d6) force damage. If the target is concentrating on a spell, they have disadvantage on the concentration save.

Null Pulse (Recharge 5-6). Each creature in a 20-foot radius must make a DC 15 CON save. Failure: 14 (4d6) force damage, lose lowest-tier active spell effect, cannot cast spells until end of next turn. Success: half damage, no additional effects.