b'Dragon, Sea, Ancient \n'b'  Family:   Dragon - Sea  \n'b'  Gargantuan   dragon ,  neutral evil  \n'b'  Armor Class  22 (natural armor)  Hit Points  481 (26d20 + 208)  Speed  40 ft., fly 80 ft., swim 80 ft.\n'b' STATS STR: 29 (+9) DEX:  10 (+0)  CON:  27 (+8)  INT:  19 (+4)  WIS:  17 (+3)  CHA:  21 (+5)  \n'b'\n'b'\n'b'\n'b'\n'b'\n'b'     Saving Throws   Dex  +7,  Con  +15,  Wis  +10,  Cha  +12  Skills   Perception  +17,  Stealth  +7  Damage Immunities  cold  Senses   blindsight  60 ft., darkvision 120 ft., passive Perception 27  Languages  Common, Draconic, Infernal, Primordial  Challenge  22 (41,000 XP) \n'b' Special Traits \n'b'   Amphibious . The dragon can breathe air and water. \n'b'  Legendary Resistance (3/Day) . If the dragon fails a saving throw, it can choose to succeed instead. \n'b'  Siege Monster . The dragon deals double damage to objects and structures. \n'b'  Actions \n'b'   Multiattack . The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws. \n'b'  Bite .  Melee Weapon Attack : +16 to hit, reach 15 ft., one target.  Hit : 20 (2d10 + 9) piercing damage plus 11 (2d10) cold damage. \n'b'  Claw .  Melee Weapon Attack : +16 to hit, reach 10 ft., one target.  Hit : 16 (2d6 + 9) slashing damage. \n'b'  Tail .  Melee Weapon Attack : +16 to hit, reach 20 ft., one target.  Hit : 18 (2d8 + 9) bludgeoning damage. \n'b'  Frightful Presence . Each creature of the dragon\xe2\x80\x99s 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 repeats the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature\xe2\x80\x99s saving throw is successful or the effect ends for it, the creature is immune to the dragon\xe2\x80\x99s Frightful Presence for the next 24 hours. \n'b'  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\xe2\x80\x99t pushed or knocked  prone . \n'b'  Legendary Actions \n'b' 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\xe2\x80\x99s turn. The dragon regains spent legendary  actions  at the start of its turn. \n'b'   Detect . The dragon makes a  Wisdom  ( Perception ) check. \n'b'  Tail Attack . The dragon makes a tail  attack . \n'b'  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.'