There are two factors behind the current boom in Pokemon TCG trading
However, the game features two RNG-based mechanics that favor free-to-play players: acquisition randomness and card draws
That mileage comes in the form of stapling a superior Rampant Growth to every creature spell you cast
Nuka-Cola Vending Machine is also pretty below rate, but churning out Foods every turn and giving you Treasures when you sacrifice Food are both powerful, even on just the standalone card
Yami Bakura used "Exchange" to seize "The Winged Dragon of Ra" instead, and with the help of the spirit of the original Marik, he was able to Summon and control "Ra", but this was thwarted when Yami Marik decreased the ATK of the monsters used to Tribute Summon it to 0 with "Joyful Doom", leaving "Ra" with 0 ATK
However, a lucky coin flip can let them attack as normal, making it a bit unpredictable