Minotaur Torch Hammer, Scorn lava launcher, Wretch naginata (the huge polearm they use), and HIVE BOOMER are just a handful of the weapons i would love to see brought up as either exotics or unique legendaries.
I also would like the scorn sniper rifle and sawblade launcher, and a Taken Phalanx shield (probably as a heavy "shotgun" that launches things similar to tractor cannon.
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I wish I could dual wield Ether swords like Fallen Captains do with a Spectral Blades-esque stance. That's just the definition of badass if you ask me.