There are three big reasons for rotation in Pokmon TCG as well as other TCGs: It keeps the Metagame fresh
There's just been so much time for Wizards to print good elves, and there are now so many of them standing around pouting and hugging trees that it's almost too easy to make a strong elves deck
What We Mentioned on the Show: EDH Essential Cards: Card Advantage and Card Draw episode: Mana Base episodes: and Profs Mana Base Videos: Quadrant Theory episode: What We Mentioned on the End Step: The Legend of Zelda: Breath of the Wild Were On YouTube
Scenario 1 is manageable, number 2 feels really difficult, and number 3 feels borderline impossible, especially if you had issues with the previous two
An effect may refer to a card, spell, or permanent that "has an Adventure." This refers to a card, spell, or permanent that has an adventurer card's set of alternative characteristics, even if they're not being used and even if that card was never cast as an Adventure