Roper
Large Monstrosity · · CR 5
- Monstrosity
- Large
- Tier 2
Roper at CR 5 is logged as a large monstrosity; alignment neutral evil. Habitat: underground. Sourced from Monster Manual (5e 2014) and Monster Manual (5.5e 2024).
Stat Block
- Challenge Rating
- 5
- Type
- Monstrosity
- Size
- Large
- Alignment
- —
- Speed
- —
- Habitats
- Underground
- Sources
- Monster Manual (5e 2014), Monster Manual (5.5e 2024)
Ecology
Ropers are sessile predators of deep underdark caverns, sustaining themselves through extreme metabolic patience. A roper can go decades between meals. They consume entire bodies, dissolving bone and metal alike with internal acids. Their droppings consist of metal slag, gemstones, and indigestible artifacts, which is why roper lairs sometimes contain treasure. They photosynthesize subtly from cavern lichen-light, supplementing their predator diet with autotrophic energy when prey is scarce.
Behaviour
Ropers are solitary and rarely interact with their own kind. They communicate via subterranean vibrations; one roper can summon another by drumming its body against rock for hours. Mating involves brief proximity and bud-formation, then immediate separation. The bud crawls off as a tiny mobile roper, finds a ceiling, and roots itself permanently. Ropers can speak Undercommon if taught, and a few bargain with deep gnomes or duergar, exchanging information about cavern movements for guaranteed feeding.
Origin
Ropers are theorized to descend from primordial cave-fungi that achieved consciousness over geological time. Their resemblance to stone formations is so perfect that natural selection alone seems insufficient; some sages suspect deity-tier intervention from earth-aligned powers. Underdark folklore claims the first ropers were petrified druids who tried to merge with mountain-spirits and got stuck halfway. Whatever the truth, they are ancient: roper individuals have been encountered that predate the rise of dwarven kingdoms.
Related Monsters
Frequently Asked Questions about Roper
- What is the challenge rating of Roper?
- Listed CR for Roper: 5. Match it to a party that fits well-established adventuring parties.
- What type of creature is Roper?
- The bestiary type for Roper is monstrosity, large size.
- Where does Roper live?
- Roper is at home in Underground.