Anyone knows how you can get orbs for gleaning? Igg is EXTREMLY bad in explaning new items.
I have misunderstood the question. It's currently unknown to me how these orbs are obtained at this point. I don't spot them in any buy or spend event either. Perhaps it's a good resource to get in the battle mall
As always, once the big cashers already spent a lot of money, a new function (in that case the orbs) will be activated by an update - to get free players easier a chance to upgrade their heroes. I personally assume they will be available as chest content within the battle square.
To keep the money running later they will be added into events too - same as they handled the enchant crystals.