When King Ulgrif found it impossible to tax adventurers nearly enough to cover the damage they do, he resorted to a sinister magic. Soon his agents were carefully pushing some slightly different bags of holding onto the market.
Wondrous item, uncommon
Acts exactly like a Bag of Holding except…
Curse. Each coin placed in the Tax Bag has a 20% chance of vanishing into the coffers of the king who had it created.