Dragon, Sea



    This aquamarine dragon has a shark’s head that tapers off into a sleek eel-like body. Its large fins double as wings.

    Divine Dragons. Sea dragons are the children of the ocean, and believe they are semi-divine beings, worthy of worship. Given their size and power, they may be right; certainly, they are often companions or steeds to gods of the sea. Despite the solemn duties the sea dragons invoke thanks to their lineage, they are extremely whimsical. While these immense creatures are playful, their games can shatter hulls and drown sailors. The sea dragons course through the waves with tangible joy as they hunt whales and entire schools of tuna.

    Sunken Hoards. Sea dragons love collecting treasure, especially prize the sunken treasure-filled hulls of ships lost to storm, battle, or their own handiwork. While they appreciate all wealth, they prefer hardy items that can stand up to long exposure to sea water. Precious metals and gemstones add a dramatic luster to the dragon’s lair when they catch stray beams of light. Sea dragons take any more perishable treasures and place them on a reef-altar, to dissolve in the sea as a tithe to the sea gods.

    Sunken Memorials. A sea dragon’s lair is littered with meticulously arranged ships consigned to the deeps. These wrecks are often artfully smashed to allow the treasures in the hold to spill out onto the sea floor. It may seem haphazard, but it displays a complex aesthetic that only other sea dragons can truly appreciate. Because they arrange these wrecks so carefully, a dragon notices immediately if its hoard is disturbed.


    Sea dragons dwell in lairs dwell in lairs beneath the waves: ocean fissures and caves, lightless trenches full of strange rock formations, and sheltered reefs of cultivated coral. Whatever the place, it’s dedicated to the worship of sea gods.

    Despite the draconic instinct for seclusion and protection when choosing a lair, sea dragons always choose lairs relatively close to humanoid trade routes and abundant supplies of fish. The sky surrounding a sea dragon’s lair is perpetually stormy, and the seas run high. If a captain is courageous, these high winds and swift-running currents can cut significant time off a voyage.

    Every sea dragon is devoted to the dragon god of the sea. As a result, many sea dragons use the innate spellcasting variant. Sea dragons favor spells that manipulate water or the weather, emulate storms, deal lightning or cold damage, divine the future, or conjure sea creatures to fight alongside the dragon.

    Sea Dragons Lair Actions

    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:

    • 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.
    • 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.
    • 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.

    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:

    • 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.
    • 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.
    • Storms and rough water are more common within 6 miles of the lair.

    If the dragon dies, conditions of the sea surrounding the lair return to normal over the course of 1d10 days.

    Section 15: Copyright Notice

    Tome of Beasts. Copyright 2016, Open Design; Authors Chris Harris, Dan Dillon, Rodrigo Garcia Carmona, and Wolfgang Baur.

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