Krull

Alchemy runs a fixed sequence. The prima materia is dissolved, purified, and finally transmuted into gold, which is never literal gold but the perfected self. The Glaive lives inside a mountain of molten fire, and to take it Colwyn must reach into the calcinatio, the burning that strips away impurity. The weapon retrieved from fire is the classic alchemical false summit: the seeker believes the shining object is the goal, when the object is only proof he survived the furnace.

The real transmutation comes later, and it comes through union. Colwyn and Lyssa are separated, and their reunion channels the "fire of the marriage," the coniunctio, the alchemical wedding of opposites that produces the philosophical gold. That fire, not the Glaive, incinerates the Beast. The film states the doctrine cleanly: the manufactured power fails, the power born from the union of two into one prevails. The Glaive was the mineral stage. The marriage was the gold.

The oldest initiation myth is the descent to retrieve the beloved from the land of the dead: Orpheus, Inanna, Izanagi. Lyssa is stolen on her wedding day and imprisoned in the Black Fortress, a stronghold that teleports across the planet each dawn so no map can hold it. The bride taken to a moving underworld the moment before consummation is the abduction-to-the-dead pattern intact, and Colwyn's quest is the descent that every initiate must make alone into a realm that will not stay still to be found.

The threshold guardians are the initiation's grammar made visible. A cyclops who knows the exact hour of his own death. A blind seer. A shape-shifting swamp Widow trapped in a web of her own grief who must be faced before the crossing. Each companion who dies to get Colwyn through the Fortress is paying the initiatory toll: the guide gives his life so the initiate can complete the passage. When Colwyn reaches Lyssa in the dark heart of the Beast's lair, he has become the man capable of the marriage-fire, having descended for a bride and returned carrying a self he did not have when he set out.

Other quests where the magic object is the test, not the answer: Excalibur (the sword that is only as whole as the king), The Dark Crystal (a shard that heals a world by being surrendered), Legend (light and dark that need each other to exist).