well keep in mind that they are expending alot of power and resources to do it. It's implied that they have been playing a very long game to reach this end.All these resurrections make their past deaths seems cheap tbh
They did say that resurrecting them required a lot of sacrifices so there’s that. Plus I’m expecting some other horrid consequences like they’re slaves to the one who summoned them or they need to kill others regularly to feed on their life energy.All these resurrections make their past deaths seems cheap tbh