If Hieromancerâ€™s Cage leaves the battlefield before its triggered ability resolves, the target permanent wonâ€™t be exiled.
If a token is exiled this way, it will cease to exist and wonâ€™t return to the battlefield.
Auras attached to the exiled permanent will be put into their ownersâ€™ graveyards. Any Equipment will become unattached and remain on the battlefield. Any counters on the exiled permanent will cease to exist.