**** I watched almost all of his match history and found that he basically didn't need to think, and seemed to know what cards and tokens would appear next. Therefore, I reasonably suspect that he used some kind of cheating tool. He registered his account on March 15th and is now about to reach Arena Rank top 1, which is terrible for a player who ranks based on their own skill. I want to report him, but I can't find a place to report such cases, so I'm asking for help here. Hope BGA can take some measures to deal with this kind of issue.
Edited: please use the proper tools to report a player, do not name them on the forums.
Edited: please use the proper tools to report a player, do not name them on the forums.