Damien taught Adam how to use the Connected String, a method for finding monsters with the same origin as Adam.
This did not mean that they were siblings or relatives. No, but their powers, energy, and genes had similar traits because of where their journey began.
However, on that day, especially because of Mariam, who had almost convinced him that the World Wipe was inevitable and that Adam had to accept his fate as it was.
In fact, between the two of them, it was Mariam who was right, but Adam was not going to accept that position anymore. This shook him deeply, but thanks to teamwork with Fromund and his support, he was able to return to his former state.
At the Corrupted Volcano, Adam became stronger, but his main reward was returning to his former self, something he had almost lost after learning the truth about what awaited the world seven years later.