Note that after you use this effect, you must mill 3 additional cards
In general, Pokmon cards in a set are broken down into three broad rarity types: Common Uncommon Rare The rarity of a card is denoted at the bottom of the card, besides the card ID: You can see on the bottom left that there is a black circle beside 001/172
Make sure you have a case that can accommodate both a thicker and wider deck
Overall, Korvold's deck is fairly powerful, but it lacks the complex nuance of other top-tier commander decks and can feel a bit repetitive
The ability makes it tough to use unless youre running a full Rocket build, but once it's active, Erasure Ball gives you some serious power
Plus they have very different energy requirements so it would be hard to play them in the same deck