yugioh spell card rules Yu-Gi-Oh! types: Every monster, and trap type explained Yu-gi-oh GX Rulebook | PDF

I believe this was never actually correct and was instead a reflection of top players understanding Time Walk decks better than others

Although you won't see one of these in the wild when you're competing, you can find them on the collectors' market where people pay top dollar for them

If you have all of "Queen's Knight", "King's Knight", and "Jack's Knight" in your GY: You can send 5 monsters, with different Levels of 1, 2, 3, 4, and 5, from your hand and/or Deck to the GY, and if you do, destroy all cards your opponent controls

As an example of how gripping card collecting in this game can be, I'm currently in the process of tracking down an immersive rare Charizard EX