Phase Spider
Monster Manual (2025) p. 239
- Size
- Large
- Type
- monstrosity
- Alignment
- unaligned
- AC
- 14
- Initiative
- 3
- Hit Points
- 45 (7d10+7)
- Speed
- walk 30 ft., climb 30 ft.
- Skills
- Stealth +7
- Senses
- darkvision 60 ft.
- Passive Perception
- 10
- Challenge
- 3
- Environment
- desert, forest, grassland, hill, planar (ethereal), underdark, urban
Traits
Proficiency Bonus
+2
Treasure
Any: The monster's treasure hoard can include monetary treasure and any kinds of magic items.
Ethereal Sight
The spider can see 60 feet into the Ethereal Plane while on the Material Plane and vice versa.
Spider Climb
The spider can climb difficult surfaces, including along ceilings, without needing to make an ability check.
Web Walker
The spider ignores movement restrictions caused by webs, and the spider knows the location of any other creature in contact with the same web.
Actions
Multiattack
The spider makes two Bite attacks.
Bite
Melee Attack Roll: +5, reach 5 ft. Hit: 8 (1d10 + 3) Piercing damage plus 9 (2d8) Poison damage. If this damage reduces the target to 0 Hit Points, the target becomes Stable, and it has the Poisoned condition for 1 hour. While Poisoned, the target also has the Paralyzed condition.
Ethereal Jaunt (Bonus Action)
The spider teleports from the Material Plane to the Ethereal Plane or vice versa.
Other data
description
Phase spiders appear out of nowhere to attack, then vanish just as swiftly. These horse-size, magical arachnids are endemic to the Ethereal Plane. From vaporous lairs, they peer through the Border Ethereal into the Material Plane. When they detect prey, phase spiders draw close and then shift or "phase" to the Material Plane to attack. They shift between planes of existence and attack from unexpected directions until they overcome their prey or are forced to retreat. Phase spiders are more intelligent than mundane spiders, but most are cowards. They usually flee if they're outnumbered by creatures capable of seeing them on the Ethereal Plane or pursuing them there. They make exceptions for ghosts and similar spirits, which phase spiders gain sustenance from and pursue as favored prey.