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Elemental, Acid (Medium)

Medium elemental, neutral

Armor Class 13
Hit Points 68 (8d8 + 32)
Speed 20 ft., swim 80 ft.

21 (+5) 16 (+3) 19 (+4) 6 (–2) 11 (+0) 11 (+0)

Skills Stealth +6
Damage Resistances bludgeoning, piercing, and slashing from nonmagical weapons
Damage Immunities acid, poison
Condition Immunities exhaustion, grappled, paralyzed, petrified, poisoned, prone, restrained, unconscious
Senses darkvision 60 ft., passive Perception 10
Challenge 5 (1,800 XP)

Special Traits

  • Acid. A creature that touches the acid elemental or hits it with a melee attack while within 5 feet of it takes 5 (2d4) acid damage. Any nonmagical weapon made of metal or wood that hits the acid elemental corrodes. After dealing damage, the weapon takes a permanent and cumulative –1 penalty to damage rolls. If its penalty drops to –5, the weapon is destroyed. Nonmagical ammunition made of metal or wood that hits the acid elemental is destroyed after dealing damage. The acid elemental can eat through 2-inch-thick, nonmagical wood or metal in 1 round.
  • Fumes. Creatures who begin their turn within 5 feet of the acid elemental must succeed on a DC 15 Constitution saving throw or be poisoned until the start of their next turn. On a successful saving throw, the creature is immune to the elemental’s fumes for 24 hours.
  • Vulnerability to Water. For every 5 feet that the elemental moves in water, or for every gallon of water splashed on it, it takes 1 fire damage.


  • Slam. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 5) bludgeoning damage plus 14 (4d6) acid damage. In addition, nonmagical armor worn by the target is partly dissolved and takes a permanent and cumulative –1 penalty to the AC it offers. The armor is destroyed if the penalty reduces its AC to 10.
Section 15: Copyright Notice

Tome of Horrors © 2018, Frog God Games, LLC; Authors: Kevin Baase, Erica Balsley, John “Pexx” Barnhouse, Christopher Bishop, Casey Christofferson, Jim Collura, Andrea Costantini, Jayson ‘Rocky’ Gardner, Zach Glazar, Meghan Greene, Scott Greene, Lance Hawvermale, Travis Hawvermale, Ian S. Johnston, Bill Kenower, Patrick Lawinger, Rhiannon Louve, Ian McGarty, Edwin Nagy, James Patterson, Nathan Paul, Patrick N. Pilgrim, Clark Peterson, Anthony Pryor, Greg Ragland, Robert Schwalb, G. Scott Swift, Greg A. Vaughan, and Bill Webb