Pricemaster, Icon of Capital

When Pricemaster, Icon of Capital enters the battlefield, each opponent exiles the top five cards of their library, and attaches them face-down to this card as wares.

{0}: Target opponent may reveal a ware, then name a mana cost. Then you name a mana cost. Then they may name another cost, and then you may. That player may pay your last named cost to play the ware. If they don't reveal a ware, put a bargain counter on Pricemaster, then deal damage to that player equal to the number of bargain counters o