Older designs

Before its current form, the Whispering Wyrm (ARC-708) underwent several design iterations, each contributing to its popularity. These include the Momo Wyrm, its most controversial version, and earlier concept models, which all varied in appearance.
=== The Momo Wyrm ===
The Momo Wyrm was the version of the Whispering Wyrm released with The Poolrooms update on April 14, 2024. It quickly became popular for its uncanny resemblance to the internet creepypasta figure Momo.
=== Concept Models ===
When the developers had to urgently change the Momo Wyrm's design, several iterations of the current wyrm's design were considered and experienced with:
* Animalistic Variant: Featured a longer, horse-like nose and sharper gremlin-like ears. The developers also experienced having this variant eyeless.
* Eyeless Variant: This design removed the wyrm’s eyes entirely, but developers ultimately decided that eyes made the entity scarier.
* Bald Variant: This version was entirely lacking its hair, which was deemed less visually distinctive.
These iterations were scrapped in favor of the current Whispering Wyrm design, which incorporated elements of aging and decay features to distance it from its resemblance to Momo.
==== October 6, 2022 Concept ====
The earliest known concept of the wyrm appeared for roughly half a second in a trailer released on October 6, 2022. This version was a snake-like creature with a bald, differently shaped head, resembling Momo but significantly smaller—standing closer in height to the Cursed Doll.