Unstitching the Pieces

As an additional cost to Unstitching the Pieces, exile a creature card from your graveyard.
Counter target creature spell with toughness less than or equal to the toughness of exiled creature. If targeted spell is countered this way, exile it.
Stitchers Notes Page #32: By mistake, I have discovered that by harnessing the essence of a being I can dispel the essence of another.