Miasmorne

{
  "ac": [
    {
      "ac": 19,
      "from": [
        "natural armor"
      ]
    }
  ],
  "cr": "16",
  "hp": {
    "average": 230,
    "formula": "20d12 + 100"
  },
  "cha": 10,
  "con": 21,
  "dex": 10,
  "int": 3,
  "str": 22,
  "wis": 10,
  "name": "Miasmorne",
  "page": 246,
  "save": {
    "con": "+10",
    "str": "+11"
  },
  "size": [
    "H"
  ],
  "type": "monstrosity",
  "skill": {
    "arcana": "+1",
    "survival": "+5",
    "athletics": "+16"
  },
  "speed": {
    "walk": 20,
    "burrow": 20
  },
  "trait": [
    {
      "name": "Acidic Attacks",
      "entries": [
        "If a creature takes acid damage from the miasmorne and that creature is wearing nonmagical metal armor, that armor is destroyed."
      ]
    },
    {
      "name": "Acidic Hide",
      "entries": [
        "After a nonmagical metal weapon hits the miasmorne that weapon melts and is destroyed. Likewise, nonmagical metal ammunition that hits the miasmorne is destroyed."
      ]
    }
  ],
  "__prop": "monster",
  "action": [
    {
      "name": "Multiattack",
      "entries": [
        "The miasmorne makes three attacks using Bite, Flechette or a combination of the two."
      ]
    },
    {
      "name": "Bite",
      "entries": [
        "{@atk mw} {@hit 11} to hit, reach 5 ft., one target. {@h}22 ({@damage 3d10 + 6}) bludgeoning damage plus 7 ({@damage 2d6}) acid damage. If the target is a Large or smaller creature, it has the {@condition grappled} condition (escape {@dc 18}). The miasmorne can't make Bite attacks while a creature is {@condition grappled} in this way."
      ]
    },
    {
      "name": "Flechette",
      "entries": [
        "{@atk rw} {@hit 11} to hit, range 60/120 ft., one target. {@h}16 ({@damage 3d6 + 6}) acid damage."
      ]
    },
    {
      "name": "Flechette Spray {@recharge 5}",
      "entries": [
        "The miasmorne launches flechettes from its fins in a 90-foot cone in front of it. All creatures in the cone must make a {@dc 19} Dexterity saving throw, taking 21 ({@damage 6d6}) acid damage on a failed save, or half as much damage on a successful one."
      ]
    },
    {
      "name": "Acidic Secretion (1/Day)",
      "entries": [
        "The miasmorne secretes an acidic solution, then sprays it around itself. All creatures in a 20-foot-radius sphere, centered on the miasmorne, must make a {@dc 19} Dexterity saving throw. Targets take 26 ({@damage 4d12}) acid damage on a failed save, or half as much damage on a successful one. All nonmagical metals within the radius that aren't being carried, as well as nonmagical metal items carried or worn by creatures that failed the save, are destroyed."
      ]
    }
  ],
  "immune": [
    "acid",
    "fire",
    {
      "cond": true,
      "note": "from nonmagical attacks",
      "immune": [
        "bludgeoning",
        "piercing",
        "slashing"
      ]
    }
  ],
  "senses": [
    "tremorsense 60 ft."
  ],
  "source": "CoA",
  "passive": 10,
  "hasFluff": true,
  "hasToken": true,
  "miscTags": [
    "AOE",
    "MW",
    "RW"
  ],
  "alignment": [
    "U"
  ],
  "senseTags": [
    "T"
  ],
  "actionTags": [
    "Multiattack"
  ],
  "damageTags": [
    "A",
    "B"
  ],
  "hasFluffImages": true,
  "conditionImmune": [
    "petrified"
  ],
  "conditionInflict": [
    "grappled"
  ],
  "savingThrowForced": [
    "dexterity"
  ]
}