Leviathan

{
  "ac": [
    17
  ],
  "cr": "20",
  "hp": {
    "average": 328,
    "formula": "16d20 + 160"
  },
  "cha": 17,
  "con": 30,
  "dex": 24,
  "int": 2,
  "str": 27,
  "wis": 18,
  "name": "Leviathan",
  "page": 171,
  "save": {
    "cha": "+9",
    "wis": "+10"
  },
  "size": [
    "G"
  ],
  "type": "elemental",
  "speed": {
    "swim": 120,
    "walk": 40
  },
  "trait": [
    {
      "name": "Legendary Resistance (3/Day)",
      "entries": [
        "If the leviathan fails a saving throw, it can choose to succeed instead."
      ]
    },
    {
      "name": "Partial Freeze",
      "entries": [
        "If the leviathan takes 50 cold damage or more during a single turn, the leviathan partially freezes; until the end of its next turn, its speeds are reduced to 20 feet, and it makes attack rolls with disadvantage."
      ]
    },
    {
      "name": "Siege Monster",
      "entries": [
        "The leviathan deals double damage to objects and structures."
      ]
    },
    {
      "name": "Water Form",
      "entries": [
        "The leviathan can enter a hostile creature's space and stop there. It can move through a space as narrow as 1 inch wide without squeezing."
      ]
    }
  ],
  "__prop": "monster",
  "action": [
    {
      "name": "Multiattack",
      "entries": [
        "The leviathan makes one Slam attack and one Tail attack."
      ]
    },
    {
      "name": "Slam",
      "entries": [
        "{@atk mw} {@hit 14} to hit, reach 20 ft., one target. {@h}21 ({@damage 2d12 + 8}) bludgeoning damage plus 13 ({@damage 2d12}) acid damage."
      ]
    },
    {
      "name": "Tail",
      "entries": [
        "{@atk mw} {@hit 14} to hit, reach 20 ft., one target. {@h}19 ({@damage 2d10 + 8}) bludgeoning damage plus 10 ({@damage 3d6}) acid damage."
      ]
    },
    {
      "name": "Tidal Wave {@recharge}",
      "entries": [
        "The leviathan magically creates a wave of water that extends from a point it can see within 120 feet of itself. The wave is up to 250 feet long, up to 250 feet tall, and up to 50 feet wide. Each creature in the wave must make a {@dc 24} Strength saving throw. On a failed save, a creature takes 45 ({@damage 7d12}) bludgeoning damage and is knocked {@condition prone}. On a successful save, a creature takes half as much damage and isn't knocked {@condition prone}. The water spreads out across the ground in all directions, extinguishing unprotected flames in its area and within 250 feet of it, and then it vanishes."
      ]
    }
  ],
  "immune": [
    "acid",
    "poison"
  ],
  "resist": [
    {
      "cond": true,
      "note": "from nonmagical attacks",
      "resist": [
        "bludgeoning",
        "piercing",
        "slashing"
      ]
    }
  ],
  "senses": [
    "darkvision 60 ft."
  ],
  "source": "MPMM",
  "passive": 14,
  "hasFluff": true,
  "hasToken": true,
  "miscTags": [
    "MW",
    "RCH"
  ],
  "alignment": [
    "N"
  ],
  "legendary": [
    {
      "name": "Move",
      "entries": [
        "The leviathan moves up to its speed."
      ]
    },
    {
      "name": "Slam (Costs 2 Actions)",
      "entries": [
        "The leviathan makes one Slam attack."
      ]
    }
  ],
  "senseTags": [
    "D"
  ],
  "soundClip": {
    "path": "bestiary/leviathan.opus",
    "type": "internal"
  },
  "traitTags": [
    "Legendary Resistances",
    "Siege Monster"
  ],
  "actionTags": [
    "Multiattack"
  ],
  "damageTags": [
    "A",
    "B",
    "C"
  ],
  "environment": [
    "coastal",
    "underwater"
  ],
  "otherSources": [
    {
      "page": 198,
      "source": "MTF"
    }
  ],
  "hasFluffImages": true,
  "alignmentPrefix": "Typically ",
  "conditionImmune": [
    "exhaustion",
    "grappled",
    "paralyzed",
    "petrified",
    "poisoned",
    "prone",
    "restrained",
    "stunned"
  ],
  "conditionInflict": [
    "prone"
  ],
  "savingThrowForced": [
    "strength"
  ]
}