This happens when a binder's ring system presses against cards, or pages shift and rub over time, especially if cards aren't properly sleeved first, as explained in The Best Pokmon Card Sleeves Guide (Penny, Matte, & Double)
Once per turn, you can place 1 A-Counter on each face-up monster your opponent controls
Particularly powerful cards rotate in and out of the banlist, and are divided into Forbidden (no copies allowed), Limited (1 copy allowed), and Semi-Limited (2 copies allowed).
I pulled together FINAL FANTASY fans from across Wizards and went game by game, shouting out various elements we found memorable
Lightsworn archetype in Edison format excels at graveyard plays with strong consistency and powerful effects
The others have a range of abilities worth exploring