Early on in this winter's standout fantasy anime Made in Abyss, the troublemaking 12-year-old orphan Riko reveals a compass that always points to the bottom of the netherworld. It's an artefact she pocketed while cave-diving in the endless pit around which her hometown formed. Boasting to her friends, Riko explains that the compass is what's galvanising her to go follow her mother, a famous cave-diver, to the pit's bottom. This happens in the first few moments of Made in Abyss's second episode, and yet, its fantasy world was already so powerfully intriguing that I knew I had to watch the whole show.