Ragnarök
en.wikipedia.org
en.wikipedia.org
https://en.wikipedia.org/wiki/L%C3%ADf_and_L%C3%ADf%C3%BEras...
[0] https://en.wikipedia.org/wiki/The_Almighty_Johnsons
[1] https://www.reddit.com/r/almightyjohnsons/comments/f7qrql/ne...
I loved how they got around the Master/Slave thing with Emporers and Vassals. Cudos for doing this even before it became common practice