Instantáneo
Hasta el final del turno, la criatura objetivo gana "

: Regresa el permanente objetivo que no sea tierra a la mano de su propietario".
The targeted creature’s controller, not Banishing Knack’s controller, is the one who can activate the creature’s new ability.
“Summoning sickness” applies. The new ability can’t be activated unless the targeted creature has been under its controller’s control since the beginning of that player’s most recent turn or it has haste.