After the banquet, Thea, alongside the Elders of the Misty Sect, conducted a high-level meeting. None of them had expected their guardian to choose to self-destruct during its battle with William, and it caught them completely by surprise.
Because of this, all of them were facing a great headache. Without a powerful deterrence, the Misty Sect was just like an average sect that could be stepped on by forces that were much more powerful than them.
The reason they were afraid was because they had also done this in the past. Meredith was once a Demigod, so very few people wanted to mess with them. This allowed the Misty Sect to develop for a thousand years, which allowed them to become one of the powerful forces in the Central Continent.