The dubbed "Mystery Pathway" is a possible new concept being added into Royal Revolt 2 v4.0.0. This concept comes from the YouTube mini-series that Flaregames TV has uploaded. This turned out to be the Conquest Event.
The concept behind the Mystery Pathway started when there was mystery put into the end of a video released on 10th March 2018 by the creators on the History of Royal Revolt 2. Then, on 18th May, the channel released a video titled "Chapter I - The Mysterious Mountain Path...", suggesting that a secret path must've been found by the Royal Workers.
In 'Chapter II: A Royal Road Trip!', the King finds out that some of his friends have already made it to this mysterious kingdom. They then went on to build the Alliance Stronghold.