Birch Siren

Large plant, chaotic evil

Armor Class 16 (natural armor)
Hit Points 147 (14d10 + 70)
Speed 30 ft.

18 (+4) 10 (+0) 21 (+5) 12 (+1) 18 (+4) 12 (+1)

Damage Vulnerabilities fire
Damage Resistances bludgeoning, piercing, psychic
Senses passive Perception 14
Languages Common, Druidic, Sylvan, Umbral
Challenge 11 (7,200 XP)
Proficiency Bonus +4


  • False Appearance. While the birch siren remains motionless, it is indistinguishable from a normal tree.
  • Rustling Copse. If two or more birch sirens use their Haunting Tune ability while within 300 feet of one another, saving throws to resist the effect are rolled with disadvantage.


  • Multiattack. The birch siren makes two Slam attacks. It can replace one of these attacks with Psychic Shriek.
  • Slam. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 (3d6 + 4) bludgeoning damage.
  • Haunting Tune. The birch siren rustles its leaves, creating a haunting chorus. Each humanoid within 300 feet of the birch siren that can hear the song must succeed on a DC 17 Wisdom saving throw or become charmed. The birch siren must take a bonus action on its subsequent turns to continue the chorus. It can stop the chorus at any time. The tune ends if the birch siren is incapacitated. While charmed by the birch siren, a creature uses all its movement to move in a random direction. to determine the direction, roll a d8 and assign a direction to each die face. The creature cannot take actions while charmed in this way. Whenever a target takes damage or begins a turn unable to hear the chorus, it can repeat the saving throw. If the saving throw is successful, the effect ends on it. A target that successfully saves is immune to this birch siren’s tune for the next 24 hours.
  • Psychic Shriek. The birch siren emits a soundless scream that tears at the minds of its victims. All non-plant creatures within 30 feet of the birch siren must make a DC 17 Constitution saving throw, taking 22 (4d8 + 3) psychic damage on a failed save or half as much damage on a successful one.


An impossibly thin figure passes through the trees, its skin and clothes formed of curling silver birch bark. The autumn leaves that adorn its crown whisper strangely in the breeze.

Birch sirens are a less common variety of treant that often live together in family units called copses.

These sirens are more malicious than their larger counterparts and delight in luring travelers deeper into dangerous woodland with their haunting melodies.

Shadow Wood. The largest population of birch sirens lives in the Shadow Realm, in the rarely traveled portions of forest that span the region. Occasionally, birch sirens are coerced to lend aid and protection to shadow fey rangers who hunt such dangerous woods.

Elven Origins. Birch sirens are rumored to have been created by the magic of the elves. These tree-folk were once guardians of vast orchards and beautiful gardens, contributing to the wonder of such places with their alluring songs. When the elves began to fade from the world, so too did the purpose of the birch sirens, and now they exist as cruel shadows of their former selves.

Section 15: Copyright Notice

Book of Ebon Tides © 2022 Open Design LLC; Authors: Wolfgang Baur, Celeste Conowitch.

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