Exile target creature you control, then return that card to the battlefield under its owner's control. If it's a Spirit, put a +1/+1 counter on it.
A spirit is both fettered and free—bound in some ways to its previous existence, yet able to transcend much of the corporeal.
Essence Flux checks whether the creature is a Spirit after it has returned from exile.
Auras attached to the exiled creature will be put into their owners’ graveyards. Equipment attached to the exiled creature will become unattached and remain on the battlefield. Any counters on the exiled creature will cease to exist.
If a creature token is exiled, it ceases to exist. It won’t be returned to the battlefield.
If a double-faced card is exiled, it will return with its front face up.