The Magic Spirit Sect's signature ability was refining evil spirits.
In battle, they would create a celestial dome, using thick fog to turn the battlefield into their home ground, and then exploit this strong geographical advantage to achieve victory.
The Blood Shadow Sect's cultivation technique involved releasing a blood fog in battle to hinder the enemy's speed, thereby gradually expanding their own advantage.
Therefore, in ambushing Lin Bai, these two sects served as the vanguards.
The blood fog was intended to reduce speed, and the celestial dome to obscure vision—a battle strategy designed entirely against Lin Bai.
Of course, considering Lin Bai was a ruthless individual capable of single-handedly wiping out an entire sect, they hadn't planned to eliminate him with this tactic alone. They only hoped to use the evil spirits to exterminate the Skyfall individuals first, thereby restricting Lin Bai's Palm Thunder.