Rust Monster

Rust Monster is a medium unaligned monstrosity.

Monstrosities are unnatural creatures with strange origins, such as mimics and owlbears.

Movement: walk 40 ft. • Senses: darkvision 60 ft.

Signature traits include Iron Scent.

Traits

Iron Scent. The rust monster can pinpoint the location of ferrous metal within 30 feet of itself.

Actions

Antennae. The rust monster targets one nonmagical metal object—armor or a weapon—worn or carried by a creature within 5 feet of itself. Dexterity Saving Throw: DC 11, the creature with the object. Failure: The object takes a -1 penalty to the AC it offers (armor) or to its attack rolls (weapon). Armor is destroyed if the penalty reduces its AC to 10, and a weapon is destroyed if its penalty reaches -5. The penalty can be removed by casting the Mending spell on the armor or weapon.

Bite. Melee Attack Roll: +3, reach 5 ft. 5 (1d8 + 1) Piercing damage.

Destroy Metal. The rust monster touches a nonmagical metal object within 5 feet of itself that isn't being worn or carried. The touch destroys a 1-foot Cube [Area of Effect]|XPHB|Cube of the object.

Multiattack. The rust monster makes one Bite attack and uses Antennae twice.

Reactions

Reflexive Antennae. _Trigger:_ An attack roll hits the rust monster. _Response:_ The rust monster uses **Antennae**.