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Ancient Sea Dragon

Gargantuan Dragon · Neutral Evil · CR 22

  • Dragon
  • Gargantuan
  • Tier 4
  • Evil

Ancient Sea Dragon is a gargantuan dragon of neutral evil alignment, CR 22. Found in underwater. Sourced from Tome of Beasts 1.

Stat Block

Challenge Rating
22
Type
Dragon
Size
Gargantuan
Alignment
Neutral Evil
Speed
40, fly 80, swim 80
Habitats
Underwater
Sources
Tome of Beasts 1

Ecology

Ancient Sea Dragon 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 Dragon is intelligent, vain, long-memoried; it remembers slights for centuries and rewards loyalty in kind. Its Neutral Evil 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 Dragon is introduced in Kobold Press's Tome of Beasts 1 (2016). 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.

CR 22 monstersAll DragonsUnderwater

Related Monsters

Frequently Asked Questions about Ancient Sea Dragon

What is the challenge rating of Ancient Sea Dragon?
Ancient Sea Dragon is rated CR 22. The rating fits the very top of the level ladder.
What type of creature is Ancient Sea Dragon?
Ancient Sea Dragon is classified as a dragon in D&D 5e, gargantuan size, neutral evil alignment.
Where does Ancient Sea Dragon live?
Ancient Sea Dragon's listed habitats include Underwater.
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QR code linking to Ancient Sea Dragon — https://www.doungim.com/dnd/monsters/ancient-sea-dragon Scannable QR code encoding the URL https://www.doungim.com/dnd/monsters/ancient-sea-dragon. Point a phone camera at this code to open the Ancient Sea Dragon page on your mobile device — useful at the table when a DM's laptop or a printed sheet is showing the page.
Scannable QR code encoding the URL https://www.doungim.com/dnd/monsters/ancient-sea-dragon. Point a phone camera at this code to open the Ancient Sea Dragon page on your mobile device — useful at the table when a DM's laptop or a printed sheet is showing the page.