Armor Class 15 (natural armor)
Hit Points 85 (9d12 + 27)
Speed 40 ft., burrow 30 ft.
Damage Immunities fire, poison
Condition Immunities blinded, charmed, exhaustion, frightened, paralyzed, petrified, poisoned, unconscious
Senses blindsight 60 ft. (can't see beyond this radius), passive Perception 11
Languages —
Challenge 5
Siege Monster. The auger deals double damage to objects and structures.
Tunneler. The auger can burrow through solid rock at half its burrow speed and leaves a 10-foot-diameter tunnel in its wake.
Flaming Drill. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 17 (2d10 + 6) piercing damage plus 7 (2d6) fire damage. If the auger moves at least 20 feet in a straight line toward the target immediately before the hit, the target takes an additional 11 (2d10) piercing damage, and if the target is a creature, it must succeed on a DC 17 Strength saving throw or have the prone condition.
Burst of Heat (Recharge 5–6). The auger releases an intense burst of heat in a 30-foot-radius sphere centered on itself. This heat spreads around corners. Each creature in this area must make a DC 17 Constitution saving throw, taking 13 (3d8) fire damage on a failed save, or half as much damage on a successful one.
PaBTSO, p. 206