Legend

Tim Curry's Darkness is the most persuasive figure in the film, and that is deliberate. He is enormous, red, horned, and articulate, and when he courts Lili he does not lie to her about what he is. He tells her the light cannot exist without him, that they are two halves that require each other. In Jungian terms he is the Shadow, everything the bright innocent world of Jack and the unicorns has refused to integrate, and the film agrees with him more than most fairy tales dare. The problem in the story is not that Darkness exists. It is that the daylight world pretended he did not, sealed him away, and left itself defenseless the moment temptation arrived.

Lili's seduction sequence is the heart of this. Darkness dresses her in a black gown that dances toward her across the floor and possesses her, and she is drawn to it, delighted by the darkness in herself she had never been allowed to meet. Her arc is not resisting evil. It is meeting the disowned part of her own psyche and choosing what to do with it. When she finally moves to smash the horn rather than let Darkness keep it, she acts from a wholeness she did not have before she was tempted.

Alchemy begins with the nigredo, the blackening, the descent into cold and putrefaction that must precede any transformation. The stolen horn plunges the world into an eternal winter, and this is the nigredo made literal: the light extinguished, the ground frozen, the work seemingly ruined. The unicorn horn itself is a classic emblem of the philosophical gold, the incorruptible solar principle, the thing whose purity is precisely what the darkening operation must consume and then restore.

Jack's journey to Darkness's underworld is the alchemist descending into his own vessel at its blackest hour. The restoration comes through opposition brought into contact: to defeat Darkness the film floods his lair with light using mirrors and shields, a marriage of the two principles rather than the mere triumph of one. The horn is returned, the second unicorn revived, and the world thaws. The gold is recovered from the black. That is the whole shape of the opus, told as a bedtime story, which is exactly where alchemy always hid its most serious teaching.