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Ancient Sea Serpent
- STR
- 24 (+7)
- DEX
- 15 (+2)
- CON
- 20 (+5)
- INT
- 13 (+1)
- WIS
- 16 (+3)
- CHA
- 12 (+1)
The sea serpent can breathe air and water.
If the sea serpent fails a saving throw, it can choose to succeed instead.
The sea serpent deals double damage to objects and structures.
Actions
The sea serpent makes one Bite attack and one Constrict or Tail attack.
Melee Weapon Attack: +12 to hit, reach 15 ft., one target. Hit: 20 (2d12 + 7) piercing damage plus 6 (1d12) cold damage.
Melee Weapon Attack: +12 to hit, reach 20 ft., one creature. Hit: 29 (4d10 + 7) bludgeoning damage, and the target is grappled (escape DC 20). Until this grapple ends, the target is restrained, and the sea serpent can't constrict another target.
Melee Weapon Attack: +12 to hit, reach 20 ft., one target. Hit: 13 (1d12 + 7) bludgeoning damage. If the target is a creature, it must succeed on a DC 20 Strength saving throw or be pushed up to 30 feet away from the sea serpent and knocked prone.
The sea serpent exhales a 60-foot cone of cold. Each creature in that area must make a DC 18 Constitution saving throw, taking 49 (9d10) cold damage on a failed save, or half as much damage on a successful one.
Legendary Actions
Legendary Action Uses: 3. Immediately after another creature's turn, this creature can expend a use to take one of the following actions; it regains all expended uses at the start of each of its turns.
The sea serpent makes one Tail attack.
The sea serpent makes one Bite attack
Find this creature in the encounter builder
Source: Fizban's Treasury of Dragons, p. 219 - Licenses and attribution