A few years ago I created the Sludge Dwarfs for both Dungeon World and Labyrinth Lord. I liked them so much, that I've decided to add them to my D&D 5th Edition game.
The Sludge Dwarves plumb the poisonous depths of the Deep Down Bellow, mining, collecting, and refining the most noxious and dangerous of alchemical substances under the earth. They sell these chemicals to the various factions of the Deep Down Bellow as well as evil wizards and alchemists on the surface world.
Sludge Dwarves are thinner and more wiry than other dwarves, with greasy green-black beards and hair. Their gray skin is mottled with scaly patches and unhealthy purple lumps. Gritty brown slime perpetually coats their clothing and gear. The sludgethrower is disgusting hand-held weapon connected by a hose to a tank full of caustic ooze worn on the user's back.
Medium Humanoid (Dwarf), Lawful Evil
AC: 15 (scale armor + dexterity)
HP: 30 (4d8+12)
STR: 14 (+2), DEX: 12 (+1), CON: 16 (+3), INT: 12 (+1), WIS: 10 (+0), CHA: 8 (-2)
Saves: Constitution +5
Skills: Survival +2
Damage Immunities: Poison
Condition Immunities: Poisoned
Senses: Darkvision 120 ft., Passive Perception: 10
Languages: Dwarvish, Undercommon
Challenge: ½ (100xp)
Shortsword. Melee weapon attack: +4 to hit, reach 5 feet, one target. Hit: 5 (1d6+2) slashing damage.
Sludgethrower*. Ranged weapon attack: +3 to hit, range 35/70 feet, one target. Hit: 8 (2d6+1) acid damage. If the target is a creature it must succeed on a Constitution saving throw (DC 11) or become poisoned. A creature so poisoned can repeat the saving throw at the end of each of their turns to remove the condition.
Poison Puddle*. Range 35 ft. The sludge dwarf uses his sludgethrower to fill a 5 ft. square with viscous, poisonous sludge. The square is considered difficult terrain. Any creature entering or starting their turn in the square suffers 2d4 acid damage and must make a Constitution saving throw (DC 11) or become poisoned. A creature so poisoned can repeat the saving throw at the end of each of their turns to remove the condition. The square remains full of sludge until it dries out in 6 hours or is washed away with copious amounts of pure water.
*Charges. A sludgethrower’s tank holds 12 charges. Each Sludgethrower attack or Poison Puddle action uses one charge. A depleted tank takes five minutes to recharge from a sludge dwarf chemical vat.