Rust Monster

{
  "ac": [
    {
      "ac": 14,
      "from": [
        "natural armor"
      ]
    }
  ],
  "cr": "1/2",
  "hp": {
    "average": 27,
    "formula": "5d8 + 5"
  },
  "cha": 6,
  "con": 13,
  "dex": 12,
  "int": 2,
  "srd": true,
  "str": 13,
  "wis": 13,
  "name": "Rust Monster",
  "page": 262,
  "size": [
    "M"
  ],
  "type": "monstrosity",
  "speed": {
    "walk": 40
  },
  "trait": [
    {
      "name": "Iron Scent",
      "entries": [
        "The rust monster can pinpoint, by scent, the location of ferrous metal within 30 feet of it."
      ]
    },
    {
      "name": "Rust Metal",
      "entries": [
        "Any nonmagical weapon made of metal that hits the rust monster corrodes. After dealing damage, the weapon takes a permanent and cumulative −1 penalty to damage rolls. If its penalty drops to −5, the weapon is destroyed. Non magical ammunition made of metal that hits the rust monster is destroyed after dealing damage."
      ]
    }
  ],
  "__prop": "monster",
  "action": [
    {
      "name": "Bite",
      "entries": [
        "{@atk mw} {@hit 3} to hit, reach 5 ft., one target. {@h}5 ({@damage 1d8 + 1}) piercing damage."
      ]
    },
    {
      "name": "Antennae",
      "entries": [
        "The rust monster corrodes a nonmagical ferrous metal object it can see within 5 feet of it. If the object isn't being worn or carried, the touch destroys a 1-foot cube of it. If the object is being worn or carried by a creature, the creature can make a {@dc 11} Dexterity saving throw to avoid the rust monster's touch.",
        "If the object touched is either metal armor or a metal shield being worn or carried, it takes a permanent and cumulative −1 penalty to the AC it offers. Armor reduced to an AC of 10 or a shield that drops to a +0 bonus is destroyed. If the object touched is a held metal weapon, it rusts as described in the Rust Metal trait."
      ]
    }
  ],
  "senses": [
    "darkvision 60 ft."
  ],
  "source": "MM",
  "passive": 11,
  "hasFluff": true,
  "hasToken": true,
  "miscTags": [
    "AOE",
    "MW"
  ],
  "alignment": [
    "U"
  ],
  "senseTags": [
    "D"
  ],
  "soundClip": {
    "path": "bestiary/rust-monster.opus",
    "type": "internal"
  },
  "damageTags": [
    "P"
  ],
  "environment": [
    "underdark"
  ],
  "reprintedAs": [
    "Rust Monster|XMM"
  ],
  "hasFluffImages": true,
  "referenceSources": [
    "EGW",
    "IDRotF",
    "IMR",
    "OotA",
    "PotA",
    "QftIS",
    "SatO",
    "SKT",
    "TftYP-ToH",
    "WDH",
    "WDMM"
  ],
  "savingThrowForced": [
    "dexterity"
  ]
}