Motes = the small pyramid shaped things that enemies drop when you kill them (see picture).
Bank = the machine in the middle of the event. You have to insert the motes here.
If you don't bank them, don't collect them. It's not loot or anything you can use outside the event.
Thanks.
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Also stop picking up the bloom like a buffoon if you see someone duping it
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This is why there isn't raid matchmaking.... These are the people you'd be trying to raid with.