Pls state (approximately if u can't tell exactly) how many Crota kills did it take for u to obtain one (or more than one). You have my greatest thanks!
If u have more than one GRobber:
[spoiler]You lucky bastards!!! XD XD XD[/spoiler]
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I've gotten four of them. It took maybe ten tries to get my first, and somewhere over the course of twenty more tries I received the rest of them.