You need a full publishing pipeline (set symbols, collector numbers, exact frame fidelity across a whole set)
Not quite sure about the SM promos, but the SWSH copies were distributed to participating stores in sealed 50-(or 100?-)card decks, so if youre really picky on card condition, you might want to bring some sleeves so that you can sleeve the cards as soon as possible, and (if you planned to get multiple copies) get the cards from different shops instead of getting all copies from the same shop, as they may share the same damage (like if an employee drop the whole deck on the ground and left corner damage on all cards)
Now we don't have to worry about making sure we still have some in hand to play
So, you only get it once, or twice since it has Unearth, but it only deals 3 damage and is limited to one target per player
Groundquake is able to do a lot of damage, especially to decks like SP that use a lot of Basic Pokmon
This is largely due to the many printing variants that need to get designed