Fate/kaleid liner Prisma Illya 3rei!

"Fate/kaleid liner Prisma Illya 3rei!" is the fourth season of the "Fate/kaleid liner Prisma Illya" anime series, which aired in 2016. The series is a spin-off of the larger "Fate/stay night" franchise and primarily features the character Illyasviel von Einzbern in an alternate universe scenario. In "3rei!", Illya and her friends have been transported to a parallel world following the events of the previous season, "2wei Herz!". This world is starkly different from the peaceful town they're used to. It's a world filled with desolation and chaos, where a group led by the Ainsworth family seeks to use Miyu, Illya's friend, for a mysterious purpose tied to humanity's survival. In this season, Illya and her allies must face off against the powerful Ainsworth family to rescue Miyu while exploring the enigmatic history of this new world. The series continues to blend elements of magical girl tropes with the more mature themes and complex mythology of the "Fate" franchise.