Spoilers
Yeah, it seems pretty clear that Nightblood is going to function off of Stormlight in a similar manner to stealing Breaths. I wonder if it would also kill the person when they ran out. Has it been confirmed that Nightblood would kill anyone who ran out of Breath holding it or whether that was just because Vasher was Returned and would die when his divine Breath was eaten?
Also, there's the fact that the black smoke from Nightblood was described as Stormlight, only dark. Personally I really like the way it continues the thematic aspect of Szeth using far more stormlight than a true radiant, kind of like a deadly parasite out of balance with the the magic of the world. Has anyone talked about the similarity between the description of Nightblood's smoke and the dakr stormlight in the gemstone Galivar had back in WoK when Szeth killed him?
