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Originally posted by StiltmanFTW
Well, I heard it's broken now.
No proof of this. Gamora mentioned that the blade "Broke on Thanos' skin". Doesn't mean it stayed broken. Bear in mind that Ronan warped the blade before and made it explode but it appeared fine right after.
Til Gamora admits that the blade is no longer usable, we really can't assume one or the other.