The first mission on DLC removes having to wait on the blades to spawn in patrol. Therefore you can kill more blades and thus increase your chances at obtaining it. It can be obtained elsewhere but that doesn't mean the people suggesting the fist of crota mission are idiots as you so eloquently stated.
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Did I say idiots? Oh wait nope, but thanks for your meaningless contribution!! Keep it up!
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You said really dumb people. Same thing
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Yep... It's official, you can't read or extrapolate information.