3rd period Otis
Play around the Orange Islands as well as Kanto and Johto, messing around with the new time-sensitive features now built into the gameplay
In combination with duplicate cards like Clone, which create a second image of our Commander, the legend rule triggers, then you sacrifice the clone and let your opponents reduce the cards in their hand in addition to discarding them
[1] As of the Japanese OCG release of Rise of the Duelist in April 2020, the 20th Secret Rare rarity was replaced by Prismatic Secret Rares
Lovecraft's Cthulhu Mythos and takes place in the 1920s, and is a fully cooperative game, with the players teaming up to fight the forces of the Mythos controlled by the game
Everyone who collected back then saw their collections 3x, 7x, 10x, 20x over time and that money opened doors to more cards, rarer cards, or significant real life gains