Witch of a Thousand Faces, Vermouth (S-UB-C01/0042EN) (S-UB-C01)

[Act] Choose a character on your field, and reveal this card from your hand. If you do, put this card face down in the chosen character's soul.
When this card enters the field by card effects, [Rest] a card on your opponent's field.
[Ambush] (When this face down card is put from the soul of a card on your field into your drop zone, you may call it by paying its [Call Cost].)