https://youtu.be/vUzGrEB-cTc
At the end of the raid when I try to purchase my red border weapon for some reason I can't.
This happened to me twice and I do not know the reason why.
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Have to shoot 3 symbols that are shown at the start of the raid under the platform the portal spawns on. 9 symbols in total and some look similar aalso you can't leave and come back has to be done in a full run. [spoiler]fyi also a chest in the jumping puzzle that can drop a red border activated with the platforms in the maze[/spoiler]