With Perrserker, you can achieve the following: Bisharp hitting 130+, Zacian can ramp up faster and OHKO 90hp basics and supportive stage 1s, Metagross can hit 120, Zamazenta hits 240 for Wailord, and Cobalion can sneak KOs at 3 prizes instead of 4
That fundamental supply-demand dynamic, fixed supply meeting growing demand, is the engine that has driven vintage Pokemon card values upward for years, and it shows no signs of stalling
Most madness cards get a highly reduced cost when played for madness, so as long as you have a somewhat decent mana base on the field, you can draw a ton of cards while also playing everything you discard
Warden of the Grove Warden of the Grove has homes in a few Commander decks
Here is a list of what the numbers on the PSA grading scale mean: PSA scores can also fall in between grades depending on the card's condition, usually with a half-point increase
You can literally change every card in the game that's a Pokemon, so I'm sure there could be plenty that you could do to cards to change the difficulty