Also this assumes you are not using dividers to sort the cards
Your adult collectors today were likely kids or teenagers playing in the past, and when those adults cut out the next generation of kids, that pipeline springs a very significant leak
[10] Besides Basic Energy cards, you may only include up to 4 copies of cards that have the same name, even if theyre from different sets or have different artwork
(2) If this card is in your GY, except the turn it was sent there: You can banish it, then target up to 5 HERO monsters in your GY and/or banishment
The X in Riku's ability is the number of times you chose a mode for the modal spell you cast, not the number of distinct modes you chose
As a subcategory of this, there are some times where incidental milling can power up your other cards