Filth Fairy

Family: Fey

Small fey, neutral evil

Armor Class 13 (natural armor)
Hit Points 45 (7d6 + 21)
Speed 30 ft., fly 30 ft., swim 30 ft.

6 (-2) 14 (+2) 16 (+3) 6 (-2) 11 (+0) 9 (-1)

Skills Perception +2, Stealth +4, Survival +2
Damage Immunities acid, poison
Condition Immunities poisoned
Senses darkvision 60 ft., passive Perception 12
Languages Common, Sylvan
Challenge 3 (700 XP)


  • Amphibious. The filth fairy can breathe air and water.
  • Innate Spellcasting. The filth fairy’s innate spellcasting ability is Constitution (spell save DC 13, +5 to hit with spell attacks). It can cast the following spells innately, without requiring material components:


  • Claw. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) slashing damage plus 3 (1d6) acid damage.
  • Slime Breath (recharge 5-6). The filth fairy spews slimy acid in a 15-foot-long cone. Creatures in the area must make a DC 13 Dexterity saving throw, taking 17 (5d6) acid damage on a failed saving throw, or half as much damage on a successful saving throw.


These small fey creatures superficially look like sprites, save for the ooze and filth that covers their body and the slightly ravenous look on their small faces. Acid sizzles as it drips from their tiny pointed teeth and sharp claws.

These small fey are often at home in the deepest, darkest swamps, where they revel in the muck and filth of the marsh. They delight in the pollution of clean waters and actively try to expand their contaminated realms. These fey also ally themselves with creatures who enjoy the same environments and even sometimes cultivate swamp oozes and other denizens of the bog. Filth fairies are sometimes found serving a green hag, or, rarely, a coven of green hags, with whom they work to control their swampy paradise.

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Tome of Horrors 2020, (C) 2020, Necromancer Games

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