Rust Monster

Type: Aberration (List)

Race: Rust Monster (List)

Monster Manual classification: Rust Monster

Alignment: True Neutral

Rare: No

Organization: Solitary or pair

CR:  ♦3Normal ♥5Hard ♠7Elite

Attack: Antennae Slam (Bludgeoning + Acid), Acid spit (Acid), Rust Monster Rust (corrodes metal armor/gear + damage to warforged), Rust Monster Stun (stuns warforged)

Special Qualities: Rust (corrodes steel weapons used against it), Scent

Habitats: 

• Entering the Gate Chamber
• Tangleroot Gorge — Inside the scorpion cave
• The Depths of Darkness
• The Depths of Despair
• The Depths of Doom
• Gwylan's Stand
• The Iron Mines: Justice for Grust
• The Missing Expedition
• The Threnal Arena
• Dread Sea Scrolls — guarding the Crest of the Trident — CR:  ♦6Normal ♠11Elite

Description: Creature that rusts metal at a highly accelerated rate for sustenance. They post a considerable threat to anyone who values their metal possessions and an existential threat to warforged.