There will be five Sagas in total that will require the Horsemen and their respective teams in order to participate, with some additional requirements for the final Saga. Each Saga is expected to be released after the second run of each Horsemen Scourge Event. Unlike Scourge Events, which run for a limited time, Sagas will be permanent additions to the new Epic Campaigns section.
Each Saga is expected to have five nodes each and there is no persistent damage between battles. You have unlimited attempts in completing these nodes. Also, there will be three levels of difficulty and requirements for each Saga.