Lagiacrus (5e Creature)
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Gargantuan beast, neutral
Saving Throws Str +15, Dex +14
Amphibious. The Lagiacrus is able to breathe in water and on land, though is clumsy in difficult terrain such as cliffsides, swampland, etc. If in an environment that counts as difficult to the lagiacrus, it suffers a -4 penalty to dexterity.
Armor Plating The Lagiacrus is covered in extremely tough scales, giving it a high armor class. If a player attempts to harvest its scales and successfully makes armor out of them, the armor class of it will be the normal armor class plus 4. It will also be at stealth disadvantage, but grant cold immunity.
Enrage The Lagiacrus will enter a ragelike state when it drops below half its max hit points. When this happens, it gains advantage on all strength and dexterity checks, and increases its land and water speeds by 20. Lightning attacks are raised by one damage die of the attack type.
Siege Monster The Lagiacrus deals double damage to structures and buildings due to its immense size.
Bite The Lagiacrus makes a bite attack against an opponent with a reach of 20 feet. Its massive jaws smash around an opponent and crush them with violent force. If it hits it deals 4d8 piercing damage, and the target must roll a constitution saving throw with a DC of 22. If failed, the target is grappled and must roll to break free. The Lagiacrus can attempt to swallow the target if it has a remaining action.
Swallow The Lagiacrus can attempt to swallow a creature grappled in its jaws, making the target roll a strength saving throw with a DC of 24. If it fails the creature is sent into the Lagiacrus' stomach, taking 4d12 acid damage at the end of each of its turns. If the lagiacrus takes 40 damage or more from the inside in one turn, it spits the creature out. The Lagiacrus can only have one creature swallowed at a time.
Claw The Lagiacrus makes a claw attack with a reach of 17 feet, dealing 3d4 slashing damage on a hit. Its claws are dull, but their size and speed makes them cause gashes that will bleed profusely. A target hit by a claw attack will bleed for 10 damage at the end of each of its turns.
Tail swipe The Lagiacrus swipes at an opponent with its tail with a reach of 25 feet, dealing 4d6 bludgeoning damage on a hit. The massive appendage will knock an opponent prone unless they succeed a DC 22 strength check.
Coiled Strike Can be used in water or on land. The Lagiacrus coils its body, gathering its strength for a few seconds before (a) on land it lunges towards an opponent and snaps its jaws around them for 4d12 damage, or (b) in water it darts very quickly at the opponent, dealing 4d12 damage as well as 5d6 cold damage to opponents within 10 feet, from the icy waters whipping around them. If Discharge is active, lightning damage is added to the attack, shown in the Discharge description. Can be used 3 times per long rest.
Discharge Can only be used in water. The Lagiacrus can use the spikes on its back as an electricity conductor, gathering electric molecules from the surrounding water. After doing this, it is able to discharge the electricity, affecting an area of 30 feet around itself as the electricity arcs in a fantastic display. If it gathers electricity once, it deals 2d10 damage. Twice, it deals 4d10 damage. And 3 times, it deals 6d10 damage.
Paralyzing Spit Can be used in water or on land. The Lagiacrus can quickly spit a ball of electricity at an opponent, rolling to hit as with a normal ranged attack. If hit the target makes a constitution saving throw (DC 22)). It takes 2d10 lightning damage on a failed save, and is paralyzed for three rounds. It can roll against paralysis on each of its turns. On a successful save, it takes half damage and is not paralyzed.
The Lagiacrus 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 Lagiacrus regains spent legendary actions at the start of its turn.
Legendary Resistance The Lagiacrus can choose to succeed a failed saving throw three times per long rest.
Roar The Lagiacrus can roar once per rest, affecting an area of 200 feet. Creatures must make a constitution saving throw (DC30) or be frightened for 3 rounds.
Static Discharge The Lagiacrus can store 4 charges in its spikes once per rest, releasing the charge on this deals 10d12 damage in an area of 50 feet surrounding the Lagiacrus.
The lagiacrus is a gargantuan creature, average size 125 feet, but ancient lagiacrus can reach titan-like sizes as they age. It prefers to make its lair in massive underwater caverns. Its striking blue scales make it blend into water easily, striking its prey quickly before it can react. Few creatures that have encountered a Lagiacrus have escaped alive, most simply becoming prey to the massive beast. Legends and ballads sung of the monster have given it the title "Lord of the Seas."