The celestial seal forbids effective violence among party guests and makes breaking the Masquerade's protection carry an infernal personal cost.
Once the Masquerade reaches its protected phase, attacks cannot land in the normal way and guests cannot freely cast magic or access inventory. Separate goodwill ballrooms project their occupants into shared space while preserving room-specific protections.
The seal is powerful enough to restrain Queen Imogen as well as crawlers and hunters. A deliberate violation requires harming an eligible party member and threatens the violator with immediate punishment in the Nothing.
The coalition must therefore restore its tools secretly, distract the room through the performance, and arrange a willing sacrifice rather than begin an ordinary fight.
An invisible celestial barrier expressed through glowing warnings and attacks passing harmlessly through targets.
The Peace Seal is the central rule that turns the evening into a timing and sacrifice problem.