What can we do with useless Yin Yang items? (like duplicates or for a character that we do not play ...)
We can only throw them away ?? 
So we're supposed to earn Pumpkin Coins without seeing how much will be required and what is the cost of rewards? :/
-
-
We can only throw them away ??
pretty much this. you can't trade them, salvage them or put them on so you can only sell them for 1DZ or throw them away.
