The Infinite Tsukuyomi

The Infinite Tsukuyomi sees Madara cast the world into eternal dream as the Eye of the Moon plan reaches fruition. The episode is the canon arc's apocalyptic climax — the moon's light trapping humanity in an endless illusion, the reality-erasing jutsu the entire war was fought to prevent, now unleashed. The world falls into the dream. It's a canon turning point of cosmic stakes, the Infinite Tsukuyomi the nightmare made real, the alliance's failure to stop it raising the question of how any hero could undo a jutsu that has already remade the world.