Treasure for the Taking

Search your library for an artifact or Treasure card with converted mana cost X or less and put it onto the battlefield. Then, an opponent of your choice searches your library for an artifact or Treasure card with converted mana cost X or less and exiles it. Shuffle your library afterwards.
It almost became a routine that they would lose their most recent trinket right after they found a shinier, sparklier, glitterier, new one.