The way you obtain new mods sucks especially for new players who don’t have all these mods waiting for Ada to sell them, some mods haven’t been sold for a year mods like Lucent Blade. Bungie should just give every player all the non raid mods( which I don’t get why these even exist) to players rather than being at the mercy of RNG.
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You can view them all in collections, there should simply be an option to acquire them. Maybe glimmer, maybe planetary materials....it could even vary depending on "value" of mods. I don't see a reason to bog down a vendor.