## Rust Monster

*Medium monstrosity, unaligned*

**Armor Class** 14 (natural armor)

**Hit Points** 27 (5d8+5)

**Speed** 40 ft.

| STR     | DEX     | CON     | INT    | WIS     | CHA    |
|---------|---------|---------|--------|---------|--------|
| 13 (+1) | 12 (+1) | 13 (+1) | 2 (-4) | 13 (+1) | 6 (-2) |

**Senses** darkvision 60 ft., passive Perception 11

**Languages** -

**Challenge** 1/2 (100 XP)

***Iron Scent***. The rust monster can pinpoint, by scent, the location of ferrous metal within 30 feet of it.

***Rust Metal***. 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. Nonmagical ammunition made of metal that hits the rust monster is destroyed after dealing damage.

###### Actions

***Bite***. *Melee Weapon Attack:* +3 to hit, reach 5 ft., one target. *Hit:* 5 (1d8+1) piercing damage.

***Antennae***. 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, its 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.