If you activate the mana ability of Shaun & Rebecca, Agents while in the process of casting a spell, activating an ability, or during a window to activate mana abilities when you're asked to pay a cost during the resolution of a spell or ability, you won't mill cards right away
This has led to the rise of cards such as Ash Blossom & Joyous Spring as a de-facto counter for many plays, activating from the hand to negate certain effects
In the Pokmon TCG, energy cards are typically common cards
Because, yknow, they're a generic anime villain with no real reason to exist
The catch is that only the fifth card in each of the Mewtwo, Pikachu, and Charizard packs will be rare, while the rest will be regular cards
The reliance on nostalgia is no coincidence, encouraging lapsed players back to the game for a cheaper path back to the main game or a casual way to play