Vasher/Zahel is a Returned, which means he needs Breath to live. But Breath doesn’t exist–
Right.
–on Roshar. Does he use St–
He uses Stormlight. One of the reasons– In fact one of the primary reasons he’s on Roshar is because Stormlight is so much easier to come by than Breath. And in fact researching about things like this is one of the reasons he discovered Roshar in the first place.
So it’s the same reason why Night– the sword…
Nightblood.
Yes.
The exact mechanics of how Nightblood ended up there will be explored in a future book.
Vasher ,
stormlight ,
Nightblood
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