"Energy Burst"
The man could feel that Jake didn't mean to do anything bad to him, so it was actually better to have his own entrusted to this person than to the soul masters who were brewing evil plans in the dark.
The man sorted out his feelings before he thanked Jake for the deal he made, even if the deal was not really a consensual deal in a sense.
[Thank you. If you can ensure my safety, my soul will always belong to you.]
The man said this with a little smile on his face. Looking at the man like this, he looked similar to Bello's humanoid form but looked a bit older than Bello's appearance.
The man was a high-level transmigrator anyway, he should have some means to save his soul from the soul masters. So, Jake would also not push the man too hard and didn't even think of making use of this man's soul.
He just got a lot of information related to this young man's previous world due to the connection between the two of them.