Rust Monster

Nature: Creature
Type: Aberration

Alignment: Neutral
Size: Medium
CR: 3

First Encountered: 5.3 "Robots In Distress"

Description: "This creature seems to be about the size of a small pony. It has 4 insect-like legs and a squat, humped, body protected by a thick, lumpy hide. Its tail is covered with armor plates and ends in a bony projection that looks like a double-ended paddle. The creature sports 2 long feathery antennae on its head, one beneath each eye."

The typical rust monster measures 5 feet long and 3 feet high, weighing 200 pounds. Their hide varies in color from a yellowish tan underside to a rust-red upper back.

Information: The lobster-like rust monster would be frightening enough even without the alien feeding process that gives it its name. They consume metal objects, preferring iron and ferrous alloys like steel, but devouring even gold, mithril, adamantine, and enchanted metals with equal ease. Their prehensile antennae can rust metals on contact, even those which normally do not actually rust.

Though rust monsters have no innate tendency toward violence, their insatiable hunger leads them to charge anything they come across that bears even trace amounts of metal, and any resistance is met with unthinking savagery. It’s not unheard of for rust monsters in metal-poor areas to track escaped victims for days using their ability to scent metal, provided the victims still have intact metal objects. Fortunately, it’s often possible to escape a rust monster’s attentions by throwing it a dense metal object and running in the opposite direction.

Those who frequent areas infested with them quickly learn to keep a few stone or wooden weapons close at hand.

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