Ancient Deep Dragon

{
  "ac": [
    20
  ],
  "cr": {
    "cr": "18",
    "xpLair": 22000
  },
  "hp": {
    "average": 247,
    "formula": "15d20 + 90"
  },
  "cha": 21,
  "con": 22,
  "dex": 16,
  "int": 19,
  "str": 23,
  "wis": 18,
  "name": "Ancient Deep Dragon",
  "page": 259,
  "save": {
    "dex": "+9",
    "wis": "+10"
  },
  "size": [
    "G"
  ],
  "type": "dragon",
  "bonus": [
    {
      "name": "Shape-Shift",
      "entries": [
        "The dragon shape-shifts into a Small or Medium Humanoid or a Small or Medium Beast, or it returns to its true form. Its game statistics, other than its size, are the same in each form. Any equipment it is wearing or carrying isn't transformed."
      ]
    }
  ],
  "skill": {
    "stealth": "+15",
    "perception": "+16"
  },
  "speed": {
    "fly": 80,
    "swim": 40,
    "walk": 40,
    "burrow": 40
  },
  "trait": [
    {
      "name": "Legendary Resistance (4/Day, or 5/Day in Lair)",
      "entries": [
        "If the dragon fails a saving throw, it can choose to succeed instead."
      ]
    }
  ],
  "__prop": "monster",
  "action": [
    {
      "name": "Multiattack",
      "entries": [
        "The dragon makes three Rend attacks."
      ]
    },
    {
      "name": "Rend",
      "entries": [
        "{@atkr m} {@hit 12}, reach 15 ft. {@h}17 ({@damage 2d10 + 6}) Slashing damage plus 5 ({@damage 1d10}) Poison damage."
      ]
    },
    {
      "name": "Nightmare Breath {@recharge 5}",
      "entries": [
        "{@actSave wis} {@dc 20}, each creature in a 90-foot {@variantrule Cone [Area of Effect]|XPHB|Cone}. {@actSaveFail} 44 ({@damage 8d10}) Psychic damage, and the target has the {@condition Frightened|XPHB} condition until the end of the dragon's next turn. {@actSaveSuccess} Half damage only."
      ]
    }
  ],
  "resist": [
    "poison",
    "psychic"
  ],
  "senses": [
    "Blindsight 60 ft.",
    "Darkvision 300 ft."
  ],
  "source": "FRAiF",
  "passive": 26,
  "hasFluff": true,
  "hasToken": true,
  "miscTags": [
    "MA",
    "RCH"
  ],
  "treasure": [
    "arcana"
  ],
  "alignment": [
    "N",
    "E"
  ],
  "dragonAge": "ancient",
  "languages": [
    "Common",
    "Draconic",
    "Undercommon"
  ],
  "legendary": [
    {
      "name": "Pounce",
      "entries": [
        "The dragon moves up to half its {@variantrule Speed|XPHB}, and it makes one Rend attack."
      ]
    },
    {
      "name": "Spore Salvo",
      "entries": [
        "{@actSave con} {@dc 20}, one creature within 30 feet of the dragon that it can see. {@actSaveFail} 16 ({@damage 3d10}) Poison damage, and the target has the {@condition Poisoned|XPHB} condition. It repeats the save at the end of each of its turns, ending the effect on itself on a success. After 1 minute, it succeeds automatically. {@actSaveSuccessOrFail} The dragon can't take this action again until the start of its next turn."
      ]
    }
  ],
  "senseTags": [
    "B",
    "SD"
  ],
  "traitTags": [
    "Legendary Resistances"
  ],
  "actionTags": [
    "Breath Weapon",
    "Multiattack"
  ],
  "damageTags": [
    "I",
    "S",
    "Y"
  ],
  "initiative": {
    "proficiency": 2
  },
  "environment": [
    "underdark"
  ],
  "languageTags": [
    "C",
    "DR",
    "U"
  ],
  "hasFluffImages": true,
  "legendaryGroup": {
    "name": "Deep Dragon",
    "source": "FRAiF"
  },
  "conditionImmune": [
    "charmed",
    "frightened",
    "poisoned"
  ],
  "conditionInflict": [
    "frightened",
    "poisoned"
  ],
  "savingThrowForced": [
    "constitution",
    "wisdom"
  ],
  "dragonCastingColor": "deep",
  "legendaryActionsLair": 4
}