yugioh best counter trap cards Card | Yu-Gi-Oh! Wiki How do counter traps work?

If you resolve two Discoveries on the same turn, they will trigger Ghouls.= Discarding cards as a cost versus doing it on a resolve: it doesnt matter in goldfish scenarios, but can be a huge difference when playing versus counterspells or soft grave hate

But in recent years, its exploded

These sets might continue the mechanics or story of the preceding set, as was typical within a block, on an individual basis, and the number of consecutive sets set on the same world would vary

Source: Dicebreaker

It appeals to serious collectors and competitive players, since in games like Magic: The Gathering or Pokmon TCG a full playset (four copies of the same card) fits in one row