EDIT: bumped for 2015 Iron Banner
EDIT:Friday December 12th.
I saw my man Xur is selling upgrades for the weapons. It costs a TON of glimmer if you want
them all upgraded. I am guessing each week he will show different weapons and armor to upgrade. I just do not want some of you fav weapons left behind!
This video is about getting glimmer back for the Iron Banner. Same rules apply for Xur upgrades. You need glimmer!
It has been used as a long time. I am very surprised it has not been patched yet! A lot know about it and some do not. This is for those people. Good luck!
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OP; another great spot is on Venus. In the part where you spawn for the Nexus Strike (but you can just make your way there on Patrol), there's hordes of Fallen and Vex that are having a war. Just off to the left of the Nexus spawn point is a Patrol beacon. If you sit by the Beacon, pop an Ether Seeds and a Blue Polyphage, you can peg the hordes of Fallen and Vex and get shitloads of Glimmer per hour. They aren't yellow-bar enemies, but there's enough regular enemies to more than make up the difference. But then, if you get that message that the enemies are moving against each other... the issue takes care of itself. :D