It was obvious that Celestial Emperor Qing Lin had invented the celestial guard spell after these seals. The celestial guards imitated the ancient gods, while these seals were used to control their servants.
There was a difference between the two. Celestial guards focused on the physical body and spells were second. Once it was successful, they would never betray you unless the caster released them.
The sealing spell wasn't perfect when it came to loyalty. As long as it was a spell, it wouldn't be perfect. With the passage of time, various issues that could cause the spell to be broken would arise.
Wang Lin was very clear about this. When the seal landed between the big-headed boy's eyebrows, his body trembled. All the celestial origin energy in his body began to activate and an identical seal formed on his origin soul. The big-headed boy took a deep breath as he got up with a wry smile and respectfully said, "Greetings, Master."