The tag pulses with a faint crimson glow during lunar events, its deep crimson enamel inlay shifting like liquid mercury beneath the surface. Tiny angular runes cover the iron disc, rearranging themselves into new patterns when held to moonlight. The edges are deliberately jagged, as if torn from something larger, while the back bears a smooth patch where generations of hands have gripped it. The tag weighs significantly more than standard tags - as if holding accumulated memory - and its surface temperature fluctuates based on proximity to the vault.

The Bloodmoon Cipher acts as a key to the vault's hidden algorithms - bearers can sense the underlying systems that govern survival odds, giving them subtle advantages in reading the course's danger zones. However, this connection to the Hoard's systems also marks the bearer for increased scrutiny from the dragon itself.