Do it now
Yao Wang sent the Mo brothers on a secret mission which he did not inform the other clan members about, the Mo brothers have participated in the same mission as him and he trusted on their ability to complete the mission he have sent them on.
He also said a few words to the elders and collected stuffs he will be needing such as the shadow mirror spell papers.
An ancient talisman that when torn will give the user an immediate transformation to the person the user intend to.
For example, with this Yao Wang can even transform into Theo Wang, the president or the his younger self.
Not only will his appearance become like that person, the way he speaks and most other feature of the other party will be granted to him.
Yao Wang took three of the shadow mirror spell papers and left the sacred demon dimension through a portal that sent him into the house of Oscar.