The ally is recruited as a mortal and changed to a ghoul afterwards (eg. Sunset Strip, Hollywood can be used to reduce its cost). His "starting life" is still the base mortal amount.
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Ghouled
Only usable when the action to recruit a mortal ally is announced.
If this action is successful, put this card on that ally and add 1 additional life to the ally from the blood bank. This ally is considered a ghoul and not a mortal. Once each combat, this ally can play a strike card that requires basic Potence as a vampire.
Rulings
Goes to the ash heap when played, if it has been removed when the action succeeds, it has no effect.
Ghouls are monsters, not mortal.
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).
Replace the action card (if any) before playing it.
Does not stack with similar effects (or another copy of itself) to provide superior version of the discipline(s) (e.g. Leech and Putrescent Servitude together does not provide superior )
Can be used to meet one (but not more than one) of the normal Discipline requirements of a multi-Discipline card.
While a minion has an effect that allows them to play cards that require Discipline(s), they do not actually have those Discipline(s).
Multiple similar effects (e.g. two Infernal Familiar, or Ian Forestal with an Infernal Familiar) cannot be used to meet the requirements of a multi-Discipline card that the minion is missing one or more Disciplines to play.
While using their ability to meet a discipline requirement, they also meet that requirement for any other cards associated with the original effect (e.g. meeting the requirement for Pack Alpha or Muricia's Call also meets the requirement for the Raven Spy employed by that effect).
The ally counts as "independent" when playing cards as a vampire