This is what I was talking about, the Vermillion Bird Quest, the quest in where we hunt down 7 boss, and it’s repeatable within 8:30-10:30PM (Wednesday, Thursday, and Friday). So that means, after you finish killing 1 set of boss (7 boss), you can repeat it again for more exp.
Well the quest is quiet hard, the boss has very big HP pool and it takes time to take them down.
Each time you kill a boss, you acquire a certain item that will prove that you killed the boss, so you really have to free at least 7 slots in your backpack. You also need to find a good team, because taking it alone is really not recommended. I was just lucky to find good group/team members that knows what they are doing.
Anyway, here are the boss spawn spots, according to my experience.
after finishing this quest, you will have to pass it to Constellation Challenge Manager NPC located at HYC (113, 62)
We were able to finish it 4 times.
Here is me, finishing the quest-
Before:
After:
nice right? I got 4 levels in an instant, hahaha.
I think, for each 7 boss, I received 440,000 exp, wow!
I also received the title <Rose Finch Lucky Star>.
This really helped me a lot, and I know there are other Constellation Great Dipper quests at other maps that I have yet to discover. watch out~ 
my journey continues-
in-game name: GodRaine
