Until it was gone.
Getting it back won't be easy, because Thea has penetrated the dimension of pure consciousness, where the laws of physics no longer apply. The universal laws are bent back on themselves, and the world she knew is only a memory.
The only way back is to vanquish the Black Knight of Unconsciousness. Her protector, the Prince of Consciousness, has already been eliminated. Her only hope is to find the Prince's sword and wield it herself.
If she fails she will fall into the abyss of eternal unconsciousness. But if she succeeds, she will be reunited with her beloved Prince forever.