C487 The Strong Little Disciple

It could be said that this little thing had been saving Kai's life all along the way.

When Tenno had obtained this thing back then, he had stayed by Tsunade's side for a very long time.

In the end, he had obtained a mysterious crystal that Tsunade had obtained from the maggot.

Tian Yu was not sure what this thing was. Even Tsunade did not know what it was until he was asked by Tenno