Soulstone

Because he had come at Mephisto's invitation, Roy didn't bring Julia, Benia, and the others with him since he knew nothing about Sanctuary. Not only them, but he also made Sareth and Fat Tiger stay obediently in the Abyss.

Therefore, in Sanctuary, Roy was alone… and it was very convenient for him to move.

Ever since he descended and disappeared, Roy had teleported toward the coldest place in this world. It was a lonely scene of ice and snow here, and there were no signs of life within a radius of hundreds of kilometers, causing Roy not to know where he was. But it didn't matter. Tens of thousands of Demon Eyes were constantly transmitting scenes to him. He might not have been able to handle so many scenes in the past, but now that he had a quantum body, he found that his brain's ability to process information had skyrocketed.