Tunneler. The worm can burrow through solid rock at half its burrow speed and leaves a 10-foot-diameter tunnel in its wake.
Multiattack. The worm makes two attacks: one with its bite and one with its stinger.
Bite. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 12 (3d8 ) piercing damage and 9 fire damage.
Tail Stinger. Melee Weapon Attack: +14 to hit, reach 10 ft., one creature. Hit: 19 (3d6 + 9) piercing damage, and the target must make a DC 19 Constitution saving throw, taking 42 (12d6) poison damage on a failed save, or half as much damage on a successful one.
Magma Belch. Ranged Weapon Attack: +12 to hit, range 30 ft., 5x5 ft. Hit: 19 (2d10+9) fire damage. The attack leaves a pool of magma at its target location, any creature or object starting its turn in this location takes 5 (1d6+2) fire damage, and has its movement range halved.
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