Below is a list of average prices of items received from the Mystical Box: Herbal Medicine Box ? Ancient Platinum 10m Auto-Hunt Scroll (1d) 15m White Feather 100m Ancient Frozen Iron 1m Platinum UpLv Stone 100m Truss Metal 600k Red Jade 1m Item Search Stone (S) 20m Gold Plate Scroll 50m Exp Booster (3%) 5m Berserk Pill 5m Silver Bar 500m Total Value of all items: 822.5m Average Value of 1 Box: 68.5m Average Value per piece: 17.13m Chance of getting an item of 20m value or less: 66.6%(disregarding HMB) Summary: The pieces are free so it's better than nothing. It's unfortunate they threw 9%,12%,15%, red jade and 3% exp in because they really aren't worth the time of collecting 4 pieces. Overall, it will add more items to the economy which shouldn't have a negative effective. (I did not include Herbal Medicine Box because I don't know all the contents and the drop rate of the items so it'll vary either way.)
Basically, it would take less effort to get all pieces if they drop everywhere from pvm or pvp. But it's hard if a piece drop from specific map, like pg where there would be empty. It will be long to get all piece.
and after u get all pieces ur drop in that box will be what? mats? red jade, wf etc... useles better do daily than this!!