Blastwork, Autocannon

Family: Blastwork

Medium construct (iron, blastwork), unaligned

Armor Class 21 (natural armor)
Hit Points 44 (8d8 + 8)
Speed 10 ft., roll 20 ft. (40 ft. downhill)

10 (+0) 16 (+3) 12 (+1) 1 (-5) 14 (+2) 3 (-4)

Skills Perception +2
Damage Resistances fire
Damage Immunities acid, poison, psychic
Condition Immunities charmed, exhaustion, frightened, paralyzed, petrified, poisoned
Senses darkvision 60 ft., passive Perception 12
Proficiency Bonus +3
Challenge 5 (1,800 XP)


  • Cannonball Recharge. The autocannon has 12 cannonballs. Used cannonballs recharge when the autocannon finishes a long rest.
  • Combustion Engine. When the construct dies, it inflicts 10 (3d6) fire damage in a 5 ft. radius. Creatures in the radius can make a DC 14 Dexterity saving throw for half damage. Alternately, when it suffers a critical hit or dies, roll on the Combustion Engine Malfunction table.
  • Constructed Nature. The construct doesn’t require air, food, drink, or sleep.
  • Repairable. A DC 10 tinker’s tools check restores one hit point for each point rolled over the DC.
  • Rolling Charge. If the autocannon rolls at least 20 feet straight toward a target and then hits it with a slam attack on the same turn, the target takes an extra 7 (2d6) bludgeoning damage. If the target is a creature, it must succeed on a DC 11 Strength saving throw or be knocked prone.


  • Slam. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) bludgeoning damage.
  • Cannon (Recharge 3-6). Ranged Weapon Attack: +6 to hit, range 600/2,400 ft., one target. Hit: 44 (8d10) bludgeoning damage.


This wheeled cannon moves of its own accord!

Essentially mobile defense systems, these autocannons attack any living creature they detect and fire at them. They have a storage of 12 cannonballs in a chamber beneath that allows them to fire continuously, although the loading mechanism is finicky and their rate of fire uneven.

Section 15: Copyright Notice

5E Foes: Video Game Bestiary. Copyright 2022, Mal and Tal Enterprises, LLC; Author Michael J. Tresca.

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