Though all the powers of Lord Foul, he suffers from a bad bad bad effect: antagonist. That means, he was already defeated, by the protagonist of his series.
And villains do tell more than actions.
Yusuke has reborn, became the lord of the underworld, and is the protagonist. That gives him a +10 Will when he's losing. (because he will start losing, given all the powers of Lord).
Yusuke Urameshi
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Ni!