Sources
CR
Type
Size
Alignment
Movement

Xill

Medium Monstrosity, Lawful Evil

Armor Class 16 (natural armor)
Hit Points 33 (6d8 + 6)
Speed 40 ft.
STR
14
+2
DEX
18
+4
CON
13
+1
INT
11
+0
WIS
14
+2
CHA
9
-1
Skills Acrobatics +6, Athletics +4, Perception +4
Senses darkvision 60 ft., passive Perception 14
Languages Common
Challenge 3 (700 XP)

Traits

Ethereal Jaunt. As a bonus action, a xill can magically shift from the Material Plane to the Ethereal Plane, or vice versa.

Poison Stinger. The xill injects poison into one creature it hit with its claws this turn. The chosen creature must make a DC 11 Constitution saving throw, with disadvantage if the xill hit it more than once this turn, taking 14 (4d6) poison damage on a failed save, or half as much on a successful one. If the poison damage reduces the target to 0 hit points, the target is stable but poisoned for 1 hour, even after regaining hit points, and is paralyzed while poisoned this way.

Actions

Multiattack. The xill makes four claw attacks.

Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit:6 (1d4 + 4) piercing damage.

Lore

Deep within the Ethereal Plane are the demiplanes, miniatures worlds built by powerful archmages and other mighty entities to serve as a private domain. Each demiplane is a designed realm, built for a specific purpose. Some are fortresses, designed to keep wanderers from the material world away. Others are far more sinister, dark realms where evil dreams take root and become ghastly realities. Such is the realm that spawned the xill, horrific, insectoid creatures created long ago to serve an…