Offer something to bargain and its actually quite strong, turning into just about any other card in your library, be that Sheoldred, the Apocalypse or Tendrils of Agony after a huge storm chain
My mom would take me and my brothers and we would have to wait in line to buy one pack each before getting back in line for more
These cards will provide options to Bodyguard - force enemy opponents to target this character over others - and apply Ward, which prevents a card from being targeted by anything except challenges, to Simba, Scrappy Cub, thereby keeping this card out for longer
Often, those decks will have something to use counters with anyway
There have even been cases of shops that sell the cards which represent monsters and their attributes, and can be used to play a tabletop game being broken into and physical fights breaking out in low-crime Japan