These are one day Rival quest not two days.
Quests:
- free 1 locked piece
- pay goods
- free 2 locked wind (green) pieces
- free 5 locked level three pieces
- recruit 5 units from your age
- gain 9 wind keys
- free 10 locked fire pieces
- gain 15 water keys and 4 hr productions of your age 14 times
Milestone rewards:
after 3 quests 3 gem pickaxes
after 6 quests 20 fragments of eternal market selection kit
So there is no milestone prize for completing all 8 quests and it's misleading to only see 6 quests on the bar shown above and then there are quests after that.