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Leviathan

Gargantuan Elemental · · CR 20

  • Elemental
  • Gargantuan
  • Tier 4

Leviathan, CR 20, fills the gargantuan elemental role. Encounter regions: coastal and underwater. Sourced from Monsters of the Multiverse and Mordenkainen's Tome of Foes.

Stat Block

Challenge Rating
20
Type
Elemental
Size
Gargantuan
Alignment
Speed
40 ft., swim 120 ft.
Habitats
Coastal, Underwater
Sources
Monsters of the Multiverse, Mordenkainen's Tome of Foes

Ecology

Leviathan is a being of one of the inner planes, summoned, escaped, or birthed where planar boundaries thin. It is most often found in coastal 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

Leviathan is simple in motivation but immense in reach — fire wants to burn, water wants to flow. Its alignment varies by individual or is irrelevant — it acts on instinct, drive, or whoever commands it. It is largely instinct-driven; complex strategy is the work of whoever (or whatever) commands it.

Origin

Leviathan is reprinted in Monsters of the Multiverse and expanded in Mordenkainen's Tome of Foes. Elementals come from the inner planes — the Plane of Fire, Water, Earth, Air, or the para-elemental borders. Within a campaign, its existence anchors a region with the kind of weight only an old, named species carries.

CR 20 monstersAll ElementalsCoastalUnderwater

Related Monsters

Frequently Asked Questions about Leviathan

What is the challenge rating of Leviathan?
On the bestiary CR scale, Leviathan sits at 20. It fits the very top of the level ladder.
What type of creature is Leviathan?
Leviathan is classified as a elemental in D&D 5e, gargantuan size.
Where does Leviathan live?
You'll find Leviathan in Coastal, Underwater according to the bestiary entry.
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QR code linking to Leviathan — https://www.doungim.com/dnd/monsters/leviathan Scannable QR code encoding the URL https://www.doungim.com/dnd/monsters/leviathan. Point a phone camera at this code to open the Leviathan 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/leviathan. Point a phone camera at this code to open the Leviathan page on your mobile device — useful at the table when a DM's laptop or a printed sheet is showing the page.