Here are the sets that, in their respective generations, contain the highest proportion of rare cards
Muldrotha, The Gravetide Muldrotha, the Gravetide is one of the easiest ways to ensure that you're able to get cards out of your graveyard to trigger Teval and similar effects
Arrival takes place within the Saiyan/Vegeta Saga, although some of the card images come from later in the series (compare a few of Vegeta and Yamcha's Personalities, which have their Androids Saga looks, for example)
Twice per turn, it cannot be destroyed by battle
These meta decks combine powerful Monsters, Spells, and Trap Cards with effective strategy and knowledge of the games mechanics to consistently come out on top, and players who dont run them will almost definitely have to face them as they reach higher competitive tiers