Medium construct, chaotic evil

Armor Class 17 (natural armor)
Hit Points 78 (12d8 + 24)
Speed 40 ft.

13 (+1) 18 (+4) 14 (+2) 3 (–4) 8 (–1) 5 (–3)

Damage Immunities poison, psychic
Damage Resistances fire; bludgeoning, piercing, and slashing from nonmagical attacks that aren’t adamantine
Condition Immunities blinded, charmed, deafened, exhaustion, frightened, paralyzed, petrified, poisoned, prone, unconscious
Senses blindsight 120 ft. (blind beyond this radius), passive Perception 9
Challenge 6 (2,300 XP)
Proficiency Bonus +3


  • Bounce. When using the Dash action, the bladewhirl can high jump a distance up to its current speed. It takes no falling damage from this jump.
  • Grappled Menace. A bladewhirl can’t grapple, but it has advantage on attack rolls against any creature grappling it.
  • Indiscriminate. Whenever the bladewhirl starts its turn, it attacks the closest creature it can sense. If no creature is near enough to move to and attack, the bladewhirl takes the Dash action to move toward the nearest creature or moves in a random direction seeking a creature.


  • Multiattack. The bladewhirl makes three blades attacks.
  • Blades. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) piercing damage and 7 (1d6 + 4) slashing damage.


Rolling Death. A bladewhirl is a mass of blades that rapidly spins to burrow into its victims. The fell intelligence animating a bladewhirl exists only to hunt and kill.

Last Resort. An evil wizard created the first bladewhirls to end a siege on her fortress. Once a bladewhirl is unleashed, it doesn’t stop killing. And the construct doesn’t discriminate among viable targets. It kills everything.

  • DC 10 Intelligence (History): Bladewhirls are murderous constructs made from numerous blades.
  • DC 15 Intelligence (Arcana): A bladewhirl is fast and able to jump to great heights. It always attacks the creature closest to it. Once a bladewhirl is free to roam and attack, it doesn’t stop.
  • DC 15 Intelligence (Arcana): A bladewhirl is immune to poison and psychic damage, and it’s resistant to fire. It takes magic weapons to harm one effectively.
Section 15: Copyright Notice

Grim Hollow: The Monster Grimoire © 2021, Ghostfire Gaming Pty Ltd. Author: Shawn Merwin

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