The agreement, once verbally established, quickly escalated into a flurry of spiritual energy as the two sides began inscribing the terms onto a scroll made of spirit beast hide that Yu Mingrou produced.
Each faction's representative poured their spiritual energy signature into the parchment, binding their promise with a subtle yet powerful, spiritual agreement. Although there's only the Poison Demon Cult on one side, the various forces of the Eastern Abyssal Domain added their names and spiritual signature to the growing document, allowing the Poison Demon Cult to freely roam the region.
Naturally, there was a clause there, telling the Poison Demon Cult to pull out their planted spies and refrain from kidnapping mortals to experiment on. And if a conflict arises, it'll be up to the heads of different factions to determine its severity.