The details are somewhat similar to when Yin Meng made the coffin.
And when it transforms into human form, its clavicle is pierced by green chains as if it had been forcibly suppressed by someone in this way.
The former is likely the work of Yin Changsheng. After all, letting the descendants of the Yin family join the feast is acceptable, but asking them to actually deal with such formidable entities is really too difficult for them.
Talisman papers are affixed to the green chains; these are the Liu family's "Evil Suppression Lock." The material is secondary, primarily relying on the user's blood from their heart to induce the Heaven and Earth energies to respond. They use this lock as a medium to execute this act of suppression, and the user also must pay a huge price for it.
This shows that this entity is indeed quite aged and quite troublesome, having been first suppressed by Yin Changsheng, and after breaking free, then subdued by the Dragon King of the Liu Family.
