/ Must be played (as well as other "as the action is announced" action modifiers) before action modifiers that are not explicitly played "as the action is announced" (e.g., Conditioning).
102316
Dominant Personality
or Only usable if a minion attempts to block. The blocking minion gets -1 intercept.
or Only usable as the action is announced. Choose a vampire. The chosen vampire cannot block this action.
Rulings
/ Replace the action card (if any) before playing it.
When played, a multi-Disciplines card counts as requiring the Discipline(s) being used. In the hand, library, or ash heap, the card is considered to require any and/or all Disciplines listed on it.