Conversely, you can insert three of these cards and change your opponent's deck little by little
The problem with 1st edition base is there is such little sales data for PSA 5 thru PSA 7 non-holos because it was, until recently, typically not worth it to grade those (they used to sell for $15 or lower for below PSA 8, hell two years ago PSA 9 non-holos were selling for under $20)
Oh, and there are several parchments that care about what you have and where you are on the Great Cloud
Official Pokemon Card
If you have a stage 2 card in your hand that evolves from that Pokmon, put that card onto the basic Pokmon to evolve it, skipping the stage 1
When this card destroys your opponent's monster and sends it to the Graveyard as a result of battle, you can select 1 face-up monster on your opponent's side of the field and flip it into face-down Defense Position.