Phase Spider
Large monstrosity, unaligned
STR
15
DEX
15
CON
12
INT
6
WIS
10
CHA
6
Armor Class: 13
Hit Points: 32 (5d10+5)
Speed: Walk 30 ft., Swim
Challenge Rating: 3 (700 XP)
Saving Throws:
Skills: Stealth +6
Senses: darkvision 60 ft. passive perception 10
Languages:
Ethereal Jaunt
As a bonus action, the spider can magically shift from the Material Plane to the Ethereal Plane, or vice versa.
Spider Climb
The spider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Web Walker
The spider ignores movement restrictions caused by webbing.
Actions
Bite
Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 7 (1d10 + 2) piercing damage, and the target must make a DC 11 Constitution saving throw, taking 18 (4d8) poison damage on a failed save, or half as much damage 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 in this way.