i think xurs hooded cloak looks badass, he should have quests and a rank, and there should be a warlock or hunter hooded garb that looks like xur's
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what would be cool is upon ranking up that he has special engrams available that create a weapon or armor that is (agent of the nine) and when these engrams only are infused into eachother they gain a random perk of the infused item. example. you have an agent of the nine autorifle, and a agent of the nine hand canon with firefly. so there would be a chance that you could get get the firefly perk to infuse into your auto rifle from the handcanon, this idea would offer a little more diversity in gear. and obviously there would need to be limits for balance.