Sources
CR
Type
Size
Alignment
Movement

Harmonium Peacekeeper

Small/Medium Humanoid, Any alignment

Armor Class 18 (plate armor)
Hit Points 45 (7d8 + 14)
Speed 30 ft.
STR
16
+3
DEX
10
+0
CON
14
+2
INT
12
+1
WIS
14
+2
CHA
11
+0
Skills Perception +4
Senses passive Perception 14
Languages Common plus one more language
Challenge 3 (700 XP)

Traits

Pack Tactics. The peacekeeper has advantage on an attack roll against a creature if at least one of the peacekeeper's allies is within 5 feet of the creature and the ally doesn't have the incapacitated condition.

Actions

Electrified Mancatcher. Melee Weapon Attack: +5 to hit, reach 10 ft., one target. Hit:8 (1d10 + 3) piercing damage plus 4 (1d8) lightning damage. If the target is a Large or smaller creature, it has the grappled condition (escape DC 13). Until the grappled condition ends, the target has the restrained condition and can't teleport, the peacekeeper can't make Electrified Mancatcher attacks, and the target takes 8 (1d10 + 3) lightning damage at the start of each of its turns.

Lore

Peacekeepers wear distinctive red plate armor and wield planar mancatchers, polearms whose metal pincers prevent criminals clamped in their grasp from teleporting away, making them excellent at catching wrongdoers in Sigil.