Potencies (Rule Card 2)

Its controller then spends the required mana or
other costs to cast it. If he or she does not or
cannot then the potency fails (leaves play permanently), the player loses 4 life and his or
her turn immediately ends. If a player announces
a potency that is not in his or her library (the
player fails to reveal the named potency as per
the rules above) or the conditions for the
potency have not been met per the text on the
potency card itself, four things occur: 1) a judge verifies (looks through