Without wasting time, Beelzebub immediately began the sealing.
The reason why he performed the sealing was mainly because Richard did not know this kind of soul-targeting sealing.
His sealings were all sealing techniques that sealed the flesh along with the soul. Even in the Furnace Man's heritage, he couldn't find a sealing technique specifically for Dominator souls.
There was no way around it; no matter how inexperienced a Dominator is, it's still a Dominator. It's not common for a Dominator to be easily manipulated. The sealing for such a Dominator was even more of an obscure technique.
Even Beelzebub figured out this soul-targeting strategy only when planning the battle scheme against Samuel, thus researching this soul-targeting sealing.
Accompanied by grand chanting, the staff in Beelzebub's hand began to grow.