Dungeons & Dragons 5e Monster : Ocean Dragon
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Ocean Dragon CR: 22
STR
29 +9
DEX
10 +0
CON
27 +8
INT
19 +4
WIS
17 +3
CHA
21 +5
• Amphibious. The dragon can breathe air and water. • Siege Monster. The dragon deals double damage to objects and structures. • Summoner. The dragón can summon up to 10 creatures from médium size made of water. Those are inmmune tu slashing damage an as a result of being damage, they can divide themselves into smaller halfs with half the original hp with a mínimum of 20. • Tidal Slam. The dragón can control an area of water sorrounding him at will. The amount of water controlled is the size of the dragon multiplied by 3. • Sea Dragon’s Lair. On initiative count 20 (losing initiative ties), the dragon takes a lair action and generates one of the following effects: The dragon can’t use the same effect two rounds in a row: a. Four vortexes, each 5 feet in diameter and up to 30 feet tall, appear within the lair where the dragon wishes. Creatures occupying the space where a vortex appears or who enter the vortex for the first time on a turn must make a DC 15 Dexterity save or be restrained. As an action, a creature can free itself or another creature from a vortex by succeeding on a DC 15 Strength check. The vortexes last until the dragon uses this lair action again or until the dragon dies. b. The dragon creates a wall of living coral on a solid surface it can see within 120 feet of it. The wall can be up to 30 feet long, 30 feet high, and 1 foot thick. When the wall appears, each creature within its area takes damage as if touching the wall and is pushed 5 feet out of the wall’s space, on whichever side of the wall it wants. Touching the wall releases painful stings that deal 18 (4d8) poison damage, or half that with a successful DC 15 Constitution saving throw. Each 10-foot section of the wall has AC 5, 30 hit points, resistance to fire damage, and immunity to psychic damage. The wall lasts until the dragon uses this lair action again or until the dragon dies. c. The dragon bends time around its enemies. Four creatures the dragon can see within 120 feet of it must succeed on a DC 15 Wisdom save or be affected by a slow spell. This effect last until initiative count 20 on the following round.
Actions
• Multiattack. The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws. a. Bite. Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 20 (2d10 + 9) piercing damage plus 11 (2d10) cold damage. b. Claw. Melee Weapon Attack: +16 to hit, reach 10 ft., one target. Hit: 16 (2d6 + 9) slashing damage. c. Tail. Melee Weapon Attack: +16 to hit, reach 20 ft., one target. Hit: 18 (2d8 + 9) bludgeoning damage. • Frightful Presence. Each creature of the dragon’s choice that is within 120 feet of the dragon and aware of it must succeed on a DC 20 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns. If a creature’s saving throw is successful the creature is immune to the dragon’s Frightful Presence for the next 24 hours. • Tidal Breath (Recharge 5-6). The dragon exhales a crushing wave of frigid seawater in a 90-foot cone. Each creature in that area must make a DC 23 Dexterity saving throw. On a failure, the target takes 44 (8d10) bludgeoning damage and 44 (8d10) cold damage, and is pushed 30 feet away from the dragon and knocked prone. On a successful save the creature takes half as much damage and isn’t pushed or knocked prone.
Legendary Actions
• The dragon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The dragon regains spent legendary actions at the start of its turn. a. Detect. The dragon makes a Wisdom (Perception) check. b. Tail Attack. The dragon makes a tail attack. c. Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 15 feet of the dragon must succeed on a DC 24 Dexterity saving throw or take 16 (2d6 + 9) bludgeoning damage and be knocked prone. The dragon can then move up to half its flying speed, or swim speed if in the water.
Regional Effects
• The region containing a legendary sea dragon’s lair is warped by the dragon’s magic, which creates one or more of the following effects: a. Sea life becomes richer within 6 miles of the lair. Schools of fish move into new waters, sharks become common, and whale migration paths shift to pass near the area. b. Water temperatures drop sharply within 6 miles of the lair. Creatures not accustomed to cold suffer exposure to extreme cold while swimming in this water. c. Storms and rough water are more common within 6 miles of the lair. d. If the dragon dies, conditions of the sea surrounding the lair return to normal over the course of 1d10 days.
Suggested Environments
Sea
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