Ok, so I will post here all we know about rift battles. You make your own "map" putting your fighters in nodes like an event. When fighting an enemy rift map you may only use each of your fighters once, also it takes no energy to do fights there. You only have 2 free rift battles entries a day. Rift battles will reward rift coins, that can be used to buy things from telesin shop. Rift battles will be a sort pf ranked mode where you will get a rank and players with similar rank will fight on your rift.