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Medium monstrosity, unaligned

Armor Class 12 (natural armor)
Hit Points 24 (7d8 – 7)
Speed 10 ft., fly 50 ft.

6 (-2) 14 (+2) 8 (-1) 3 (-4) 12 (+1) 6 (-2)

Skills Perception +5
Damage Resistances bludgeoning, piercing, slashing
Condition Immunities charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned
Senses passive Perception 15
Challenge 2 (450 XP)

Special Traits

  • Aversion of Noise. If the stymphalians takes thunder damage or is surprised by a loud noise, it has disadvantage on attack rolls and ability checks until the end of its next turn.
  • Swarm. The swarm can occupy another creature’s space and vice versa, and the swarm can move through any opening large enough for a Tiny raven. The swarm can’t regain hit points or gain temporary hit points.


  • Beaks. Melee Weapon Attack: +4 to hit, reach 5 ft., one target in the swarm’s space. Hit: 7 (2d6) piercing damage, or 3 (1d6) piercing damage if the swarm has half of its hit points or fewer.
  • Feathers (Recharge 5-6). The stymphalians fire feathers in a 15-foot cone. Each creature in that area must make a DC 12 Dexterity saving throw, taking 21 (6d6) piercing damage or 10 (3d6) piercing damage if the swarm has half of its hit points or fewer on a failed save. Creatures take half as much damage on a successful save.


These birds are of the size of a crane, and are like the ibis, but their beaks are more powerful, and not crooked. It has brass feathers and talons.

These strange metallic-feathered birds are sacred to Ares.

When stymphalians makes their lair, they feed on living creatures within a 5-mile radius. Stymphalians are very fond of flesh and devour livestock, cattle, and will attack humans.

On the Move. Stymphalians reside in the Stymphalian lake in Arcadia. They were driven by Hercules and compelled to take refuge in the island of Aretias in the Euxine, where they were afterwards found by the Argonauts.

Bronze Fury. Stymphalians attack from the air. When flying, stymphalians loose a volley of bronze feathers at its foes or else swoops down and attacks with their beak, flying out of range before opponents can react. On the ground, stymphalians attack with their beaks.

Section 15: Copyright Notice

5E RPG: Ancient Adventures. Copyright 2020, Mal and Tal, LLC; Author Michael Tresca.