Sarevok lost his Bhaalspawn powers when he died. So he no longer has the ability to "harness the infernal energies" of the blade.
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Nature’s first green is gold,
Her hardest hue to hold.
Her early leaf’s a flower;
But only so an hour.
Then leaf subsides to leaf.
So Eden sank to grief,
So dawn goes down to day.
Nothing gold can stay.
okay, so uh, Sword of Chaos... 
Linear Mode
