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I used this to run a campaign back in 4th edition, but, pair this with homebrewing some schools based around blood speakers and lost samurai and I think you could run this easily in 5e as well. You may find that the way I planned this campaign looks fairly similar to the GM’s 20 Questions document on my Itch account, and I would totally recommend using them side-by-side, that would work out pretty well I think. The campaign starts the players off in the shadowlands, within the City of the Lost, then it expects them to play through the fight at the Lost Temple of the Seven Thunders during the death of Emperor Toturi where they’re then forced to either infiltrate Rokugan or be assaulted by the very Oni who used to side with their lord Daigotsu.