Armor Class 16 ({@item breastplate|phb})
Hit Points 11 (2d8 + 2)
Speed 30 ft.
Senses passive Perception 9
Languages any one language (usually Common)
Challenge 1/2
Explosive Tank. When the guard dies, or if it rolls a 1 when checking whether its Scorchbringer action recharges, the tank on its back explodes in a 10-foot radius sphere. Each creature in that area must make a DC 12 Dexterity saving throw, taking 7 (2d6) fire damage on a failed save, or half as much damage on a successful one. The explosion ignites flammable objects that aren't being worn or carried, and it destroys the scorchbringer.
Light Hammer. Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 4 (1d4 + 2) bludgeoning damage.
Scorchbringer (Recharge 4–6). The guard's scorchbringer spouts a stream of flame in a line that is 30 feet long and 5 feet wide. Each creature in the line must make a DC 12 Dexterity saving throw, taking 7 (2d6) fire damage on a failed save, or half as much damage on a successful one.
Guildmaster's Guide to Ravnica, p. 243