Ninjago: Yin and Yang

AU: Kai was manipulated by Harumi into joining the SOG. After Garmadon's eventual defeat, he ran away to live in exile.

23 years after the Ninja defeat Garmadon, something is wrong in Ninjago. A darkness is coming, and few can sense it. After receiving strange dreams (or maybe visions? Ari's not sure) from what looks like the Anacondri tomb, Ari Pamidala sets out to find an old foe who she believes is the key to saving Ninjago

Cross-posted on AO3 :))