Here is the actual Patent:
https://patents.google.com/patent/US20160279522A1/en
They also patented the Siege system too, where you can build a foundation and then have other players attack. Super interesting stuff. They were trying to get it since 2015 and this patent will last until 2035.
TO be fair - another game company can do something very similar and call it “The Revenge System” or some bullshit. WB will 100% sue, as it is their nature. But as long as it skirts some of these traits, should be ok. But I am not a lawyer.
https://patents.google.com/patent/US20160279522A1/en