Metal Devourer

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Medium Monstrosity, Neutral Evil

Armor Class 14 (natural armor)

Hit Points 68 (8d8+24)

Speed 30 ft.

STR 15 (+2)

DEX 12 (+1)

CON 16 (+3)

INT 1 (-5)

WIS 5 (-3)

CHA 1 (-5)

Saving Throws Con +5

Skills Stealth +4

Condition Immunities prone

Senses darkvision 60 ft., passive Perception 8

Languages —

Challenge 4 (1,100 XP) Proficiency Bonus +2

Metal Hunger. The Metal Devourer can consume metal objects as an action. For every 5 pounds of metal consumed, it regains 5 hit points.

Rusting Aura. Creatures within 10 feet of the Metal Devourer with metal equipment must succeed on a DC 13 Constitution saving throw at the start of their turn or take 7 (2d6) acid damage as the metal begins to corrode.

Actions

Multiattack. The Metal Devourer makes two bite attacks.

Bite. Melee weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 12 (2d8+3) piercing damage. If the target is wearing metal armor or carrying metal equipment, the target must succeed on a DC 13 Constitution saving throw or the item takes a permanent and cumulative -1 penalty to damage rolls. If it reaches a penalty of -5, the item is destroyed.

Environment Forest, Mountain

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Lore & Description

Appearance

The Metal Devourer resembles a massive, rusted insectoid creature, its crystalline eyes glimmering in hues of orange and dark brown. Its carapace is riddled with patches of corroded metal, giving it an abstract, jagged appearance. Its bite reveals serrated mandibles capable of chewing through even the toughest armor.

Behavior & Origins

Metal Devourers are grotesque monstrosities born from the remnants of metals lost to time. They thrive in areas rich in metal decay, lurking in caverns, ruins, and battlefields where discarded armor and weapons lay. These creatures are incredibly territorial and often travel in small packs, devouring anything made of metal, including weapons and armor that adventurers depend on. Their presence is often heralded by a faint hissing sound as metal begins to corrode in their aura.

Generation Info

Original prompt:
"A rust monster that devours metal"

Created: Jan 28, 2026
Modified: May 22, 2026

Metal Devourer

Actions

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Lore & Description

Appearance

Behavior & Origins

Generation Info

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