Lucien can be called a lot of things but stupid isn't one of them. He was well aware of the dangers outside the empire since its filled with different mythical and legendary beasts, Organizations that exist outside the three empires, cults, and extremely dangerous individuals! Only a fool will believe that his strength is enough and won't put up countermeasures.
So when the emperor offered the soul seal, Lucien didn't hesitate to accept the offer with joy.
"What is the second option…" Lucien asked why trying hard to mask his excitement.
"You will give me details of everything that happens in this expedition... We are aware of your little affair with Instructor Emma took the initiative to meet you and give you far more benefits than you are willing to tell us, before inviting you to help her…" Emperor Fei said with a sly smile on his face.