Player to pawn

"Give me the oath tablet."

A big smile appeared on Robin's face, then he hurriedly tossed a metal tablet to the Tree Father, who in turn picked it up, passed his soul sense through it, and began reciting a clear oath.

The oath was not long and full of terms and conditions and needed to be checked for loopholes and all of that. The Tree Father did not place an expiry date for the oath or a condition to end it, It was a very simple declaration of loyalty. This showed the tree father's utmost sincerity and this is exactly what he was trying to show. 

After that, he passed the oath tablet again to Robin and bowed slightly, "I greet the Emperor."

"Haha, marvelous! I assure you that you will not regret your choice today, Descartes. You will gain much more than simply nullifying your Return to Earth!" Robin shouted laughing, even Billy beside him let out a long sigh of relief, this was an event worth celebrating!