Medium dragon, Neutral
| Armor Class | 17 |
|---|---|
| Hit Points | 153 (18d8 + 72) |
| Speed | 50 ft., swim 50 ft. |
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 16 (+3) | 25 (+7) | 19 (+4) | 13 (+1) | 15 (+2) | 14 (+2) |
| Saving Throws | Con +8, Dex +11, Str +7 |
|---|---|
| Skills | Perception +6, Stealth +11 |
| Damage Vulnerabilities | — |
| Damage Resistances | cold; fire |
| Damage Immunities | poison |
| Condition Immunities | grappled; poisoned; restrained |
| Senses | blindsight 30 ft., darkvision 120 ft., passive Perception 16 |
| Languages | Aquan, Common, Draconic |
| Challenge | 10 |
Seth can breathe air and water.
Seth has the invisible condition while fully immersed in water.
Seth makes one Bite attack and two Claw attacks.
Melee Attack Roll: +11 to hit, reach 10 ft., one target. Hit: 10 (1d6 + 7) piercing damage plus 9 (2d8) cold damage.
Melee Attack Roll: +11 to hit, reach 5 ft., one target. Hit: 14 (2d6 + 7) slashing damage.
Seth exhales a torrent of frigid water in a 30-foot cone. Each creature in that area must make a DC 16 Constitution saving throw. On a failed save, the creature takes 36 (8d8) cold damage and has the incapacitated condition until the end of its next turn. On a successful save, the creature takes half as much damage only.