What at first appears to be a pile of rust begins to move, revealing itself to be a carpet of russet-colored, insect-like creatures.
AC 20, touch 20, flat-footed 18; (+8 size, +2 Dex)
Speed 40 ft., climb 10 ft.
Str 1, Dex 15, Con 10, Int —, Wis 10, Cha 2
Environment any underground
Rust (Ex) Whenever a rust mite swarm deals damage to a creature, any metal armor, shield, or weapon worn or carried by that creature takes an equal amount of damage. A rust mite swarm's swarm attack deals 6d6 points of damage to unattended metal objects. Damage that a rust mite swarm deals to a nonmagical metal object ignores that object's hardness.