I have completed this event thoroughly! In other words, I have purchased all items in the shop. YAY! If you have labored really heavy in the first week, you will have small work to complete the rest in second week since it is kind of unreliable to wait and combat densely high raid BOSS due to the chance of failure to kill...

I was trying to post the link but it appears that I am not sufficiently qualified to post the picture of proof...