Hub JP
None that i and a few others are aware of, i grabbed all 4 flags but nothing happened.
Jade Quarry: Ra Seru(Guard), Synthetic Protocol(Engi), Forbidden Alchemist(Necro).
I asked a similar question and here was the dev response:
They’re just there for fun! The Hub is all about partying and partying up.
That’s fine, I did enjoy getting to it, then using the canons. And receiving hundreds of tells asking how to get there XD just wanted to make sure I wasn’t missing something. Thanks.