Properties
Wondrous item, uncommon. Once per short rest, the wearer has advantage on one Intelligence or Dexterity check to identify, forge, or bypass a seal, sigil, lock, or written ward. Once per dawn as a reaction when an alarm activates within 30 feet, the wearer suppresses that alarm until the end of the next round.
Lore
Embassy auditors carry paired counterseals so no single official can erase a public record. Sera fused this brooch from the two seals that proved her testimony.
Game Master guidance
Suppressing an alarm delays its sound and signals but does not undo another effect already triggered. The brooch offers no authority by itself, and later adventures provide alternate solutions.
Related use
The item is designed as a memorable reward rather than a requirement for later play. A party without it can solve every related scene with the listed checks, tools, spells, or environmental choices.