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Object
Object

Fake Kroll's Bird Mask and Feathered Costume (Swampie Costume)

The false deity’s costume comprises a dark wood or polished bone mask carved into a hooked beak with hollow eyes lined with a faint glint, its surface etched with warlike symbols matching the raven motifs on the feathered cloak. Thick black and brown feathers obscure the wearer’s form entirely, allowing silent movement through the shadows to blend with the swamp’s ravens. The mask’s rigid beak lifts as the Doctor tears it away, exposing the Swampie impersonator’s true face beneath the sacred facade. A bulky ensemble of synthetics and adhesives molds itself to the wearer's frame, crafted to approximate the grotesque physique of the mythical Kroll. Its latex skin stretches taut over a latticework of rods and wiring, with ambient methane vents posing as breath valves along the collar. Crude but effective facial appliances—mottled green and yellow—distort the wearer's face enough to sell the illusion at a distance.
4 appearances

Appearances in the Narrative

When this object appears and how it's used

4 moments
S16E18 · The Power of Kroll Part 2
Uncovering the Kroll imposter

The elaborate bird mask and feathered cloak, designed to merge with the swamp’s ravens and amplify the Kroll mythos, loses its rigid beak structure as the Doctor tears it upward. The feathers, once swirling in ritual dance, become disheveled and splayed across the cavern floor, revealing the true form of the imposter and collapsing the sacred illusion.

Before: Fully assembled, concealing the Swampie actor’s body and allowing him to blend with the swamp’s avian life during ritual performances.
After: Partially detached and scattered, its carved war motifs exposed and its polished bone beak split upward by the Doctor’s hands, rendering it visibly artificial.
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S16E18 · The Power of Kroll Part 2
Exposed Swampie costume foils false Kroll

The feathered costume, with its carved bone mask and dark plumage, becomes redundant immediately upon the prosthetic head’s removal. Its ceremonial feathers billow as the wearer moves, masking his identity and enabling silent movement among swamp ravens, but now serve only to slow his escape.

Before: Worn by the false Kroll as a sacred disguise during ritual performances and intimidation, blending into the swamp’s avian life and the cult’s iconography
After: Discarded or partially shed during the violent escape, its feathers strewn across the cavern floor as the impostor flees
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S16E9 · The Stones of Blood Part 1
Doctor confronts De Vries about his occult devotion

The acolyte’s bird mask, carved from dark wood in a hooked beak shape, and the feathered costume woven from black and brown plumage enable silent movement through shadows. The mask’s hollow eye sockets and ritual symbols let it materialize like a predator before striking the Doctor once and vanishing, instrumental in ensuring the ambush’s success.

Before: Hidden within the folds of heavy curtains or behind carved paneling, ready for sudden deployment
After: Mask remains on the acolyte’s face as it retreats into darkness; costume’s feathers show no visible damage but carry the faint metallic scent of spilled blood
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S16E9 · The Stones of Blood Part 1
De Vries attacks the Doctor and declares his fate

The bird mask and feathered costume serve as silent insignia of the Cult of the Cailleach, moving with uncanny silence to fulfill De Vries’ will. The mask’s hollow eye sockets and curving beak create an unsettling silhouette as it advances, enabling the ambush that renders the Doctor unconscious and vanishes thereafter.

Before: Hidden or stored out of sight until summoned
After: Retreats back into shadow after enabling the assault
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