Zym'thloqeswenus

When you cast Elder Broker, you may put X cards
your opponents own in exile into their owner's
graveyards. If you do, create X Treasure tokens.

{2}{b}, {t}: Target opponent may search their
library for a card, reveal it, put it into their hand,
then shuffle. If they do, create a number of
Treasure tokens equal to the mana cost of that card.

"The only cost worth asking is one you can't afford."