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Swarm of Flying Cliones

Medium swarm of Tiny aberrations, unaligned

Armor Class 14
Hit Points 49 (9d8+9); Wound Threshold 13
Speed 10 ft., fly 40 ft.

10 (+0) 18 (+4) 12 (+1) 4 (-3) 10 (+0) 8 (-1)

Damage Resistances bludgeoning, piercing, slashing
Condition Immunities blinded, charmed, deafened, frightened, grappled, paralyzed, petrified, prone, restrained, stunned
Senses blindsight 60 ft., passive Perception 10
Languages understands simple words in Deep Speech but can’t speak
Challenge 3 (700 XP)


  • Amphibious. The swarm of flying cliones can breathe air and water.
  • Screech. When a creature moves within 10 feet of the swarm of flying cliones for the first time on a turn or starts its turn there, it must make a DC 11 Constitution saving throw or be deafened for 1 minute. A creature can repeat the saving throw at the end of each of its turns and end the effect on a successful save.
  • Aerial Grace. The swarm of flying cliones does not provoke attacks of opportunity when it flies out of an enemy’s reach.
  • Swarm. The swarm can occupy another creature’s space and vice versa, and the swarm can move through any opening large enough for a flying clione. The swarm can’t regain hit points or gain temporary hit points.


  • Blood Drain. Melee Weapon Attack: +6 to hit, reach 0 ft., one target in the swarm’s space. Hit: 21 (6d6) piercing damage, and the swarm of flying cliones attaches to the target. While attached, the swarm doesn’t attack. Instead, at the start of each of the swarm’s turns, the target loses 21 (6d6) hit points due to blood loss, or 10 (3d6) hit points if the swarm has half of its hit points or fewer. The swarm of flying cliones can detach itself by spending 5 feet of its movement. A creature in melee with the swarm can use its action to detach the swarm by making a DC 12 Strength (Athletics) or DC 12 Dexterity (Acrobatics) check. The Dexterity (Acrobatics) check can only be made by the creature the swarm is attached to. The flying clione can detach itself by spending 5 feet of its movement. It does so after it drains 10 hit points or the target dies. Any creature, including the target, can use its action to detach the clione.


The flying clione is an aberration that defies scholars’ attempts to describe it. It’s small and appears to swim through the air. It’s translucent and bioluminescent with shades of yellow, orange, and blue. An oblong body ends in an eyeless head that has a mouth and graceful tentacles reminiscent of an animated flower’s corolla.

An elegant, agile, and dangerous predator of small prey, it behaves very violently, often with no regard to its own survival when swarming. This property is readily used by greater aberrations that turn the clione into a fearsome weapon.

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Creatures: Netherworld Kickstarter Monsters Preview Copyright © 2022 Agate RPG Authors Joëlle ‘Iris’ Deschamp and Nelyhann

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