Authentication: Grading companies verify the cards authenticity, which is crucial in a market flooded with counterfeits
For example, if you are using a deck that relies heavily on Machine-type cards, pairing those with a spell card like Limiter Remover, which doubles the attack of all Machine monsters you currently control, can make the difference in any given battle phase
Diancie Ability - Princesss Curtain As long as this Pokmon is in the Active Spot, whenever your opponent plays a Supporter card from their hand, prevent all effects of that card done to your Benched Basic Pokmon
If you have three or more lessons in your graveyard, you can attack and block with The Lion-Turtle, a strong 3/6 creature for 3 mana
Heck, hed happily settle for 10 million yen