Ancient Sea Serpent
Gargantuan Dragon · Neutral · CR 14
- Dragon
- Gargantuan
- Tier 3
- Neutral
As a gargantuan dragon (neutral), Ancient Sea Serpent carries CR 14. Common in underwater environments. Sourced from Fizban's Treasury of Dragons.
Stat Block
- Challenge Rating
- 14
- Type
- Dragon
- Size
- Gargantuan
- Alignment
- Neutral
- Speed
- 20, swim 60
- Habitats
- Underwater
- Sources
- Fizban's Treasury of Dragons
Ecology
Ancient Sea Serpent is one of the elder species, claiming a wide territory and shaping the ecology around it for centuries. It is most often found in underwater regions. It is gargantuan-sized, which shapes how it hunts, hides, or fights. As a legendary creature, it is rare in the world and likely the only specimen of its kind in the local region.
Behaviour
Ancient Sea Serpent is intelligent, vain, long-memoried; it remembers slights for centuries and rewards loyalty in kind. Its Neutral alignment shapes how it engages with the world — predictable in tendency, even when unpredictable in detail. It is intelligent enough to plan, scheme, or remember.
Origin
Ancient Sea Serpent is expanded in Fizban's Treasury of Dragons. Dragons in D&D canon trace to Bahamut and Tiamat, with each lineage having its own founding myth. Within a campaign, its existence anchors a region with the kind of weight only an old, named species carries.
Related Monsters
Frequently Asked Questions about Ancient Sea Serpent
- What is the challenge rating of Ancient Sea Serpent?
- On the bestiary CR scale, Ancient Sea Serpent sits at 14. It matches tier-3 encounter math.
- What type of creature is Ancient Sea Serpent?
- By creature type, Ancient Sea Serpent is a dragon, gargantuan size, neutral alignment.
- Where does Ancient Sea Serpent live?
- The bestiary places Ancient Sea Serpent in Underwater.