rules of pokemon cards for the Pokémon Trading Card Game, Version Two Rules help : r/PokemonTCG

You may want to consider Reliquary Tower if you build something similar, you'll always have a full hand or more

Contents: 9 Play Booster Packs 1 Collector Booster Pack 15 Foil Lands 15 Regular Lands 5 Regular Promo Cards 1 Themed Clickwheel 1 Setup Box Limit 2 per customer

If this causes the number of historic cards in your graveyard to change (probably because you are casting The Capitoline Triad from your graveyard), that new number will be used to determine the cost reduction

The best way is actually using existing foil cards

As I mentioned earlier, planeswalkers are great at ending the game if left unchecked, and thats a feature, not a bug