Magma Worm

A first-age thing of fire and stone that devours the earth itself.

Solitary, primordial, large, terrifying. Creatures of the first age, things of fire and stone. They're segmented, 3' thick and 20' long, covered in overlapping plates that glow red at the seams. The air heat-shimmers around them. They have no eyes, just a great mouth-opening and concentric rows of grinding teeth that melt and burrow through rock.

HP 19 · Armor 4

Bite d10+3 (hand, close, grabby, messy, 1 piercing)
Searing touch d10 (hand, area)

Instinct: To devour minerals and metal

Moves

Erupt from below without warning
Melt through obstacles that would stop anything else
Leave a tunnel of solidifying rock
Ignore everything that cannot hurt it