I was informed that this "Xür" sells "exotics" and was utterly dismayed when I found out that a space-whale wasn't within his catalogue.
Whales are exotic creatures and this game takes place in space, so I really don't understand how this can't happen.
Chop chop, Bungie; make this happen.
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And the last thought of the petunia before it hit the ground was, "not again"