Only usable when this reacting vampire is about to enter combat with an acting younger vampire.
Untap the acting vampire, do not tap this reacting vampire, and end the current action (and combat). The acting vampire cannot attempt the same action this turn.
As above, but do not untap the acting vampire.
Clarifications and Rulings
Is governed by the "same action" rulings. [RTR 19950509]
Obedience can be played (by an untapped older vampire) to avoid the new combat started by superior Psyche!. [LSJ 19991025]