If your deck's key engine is a 4cmc commander like Kaalia of the Vast, for example, then you will want to run ramp cards that can get her out faster, which means ramp that is between 0-2cmc so you can cast Kaalia on turn 3 or earlier instead of her usual turn 4
You can perform one action per turn from the following options: attach energy to a Pokmon, use a Trainer card, evolve a Pokmon, use a Pokmons ability, switch your Active Pokmon with one on the Bench, or place a new Pokmon onto the Bench
Secrets of Strixhaven introduces a brand-new Pest token to MTG, which, appropriately enough, is already getting under many players skin
Add in things like variants of cards, and this gets very complicated to communicate and understand
Board wipes Search "destroy all" or "each creature" to find sweepers for when the board gets out of hand