If that card is an Energy card, this attack does 90 more damage, and attach that card to this Pokmon
Tournament and Promo Cards Rather than pulling the cards from a booster pack, some cards were originally printed as prizes for tournaments or promotional giveaways
True, there's a downside, you also have to discard an energy
(2022-06-10) If a token is exiled this way, it will cease to exist and won't return to the battlefield
Boosters : Expand your collection and enhance your deck with new cards
Aetherize is OK, but you rarely want to hold open your mana to protect yourself from a single opponents attack when you could just cast more, scary spells instead