Sorin, Lord of Innistrad ability:
[-6]: Destroy up to three target creatures and/or other planeswalkers. Return each card put into a graveyard this way to the battlefield under your control.
Mimic Vat ability:
Imprint — Whenever a nontoken creature is put into a graveyard from the battlefield, you may exile that card.
What happens when both are on the battlefield and Sorin's -6 ability is used?