So. Elden Ring Nightreign isn't really an arpg. It's a roguelike with elden ring combat slapped onto it, 3 player coop, "timelimited" map - battle royal ring that closes during the day until a small circle remains and it becomes night. then you fight a boss during the night, bosses are reused bosses from ER and older DS games. Repeat for a cycle of 3 days/nights and if you survive that long you get to fight 1 out of 8 special bosses, i.e. new bosses for this game.
Not sure pekora will actually like it long term if she plays it. Could be fun for some streams depending on how long the runs are.
Too bad, I was kind of looking forward to a coop arpg collab series.