Pawns of Loki is the best event type FEH has ever had. If you missed it it's autochess, but the rules feel really well thought out. It would be great if the devs would just replace one of the other PVP modes with it permanently because I couldn't stop playing it when it was up and can't wait to play it again. I have so many build ideas I want to try that I didn't have complete at the time.