(10/7/2022) Standard Procedure's effect isn't a copy effect
Like most Pokmon cards, the value of Chandelure depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Phantom Forces)
For most formats, there is no maximum limit on the number of cards you can have in your deck
Here is the full card list of SV2D Clay Burst: If you are on a PC, you can try to Right-Click the Image and choose 'Open Image in New Tab' for the bigger picture
Green Slime, on the other hand, is a way to not only get rid of powerful pieces like Rhystic Study or Smothering Tithe, but also stop them triggering at all
Pull Rates While it may seem like Japanese Pokmon releases offer less than their English equivalents, they are considered to have a higher value since they have better pull rates for rare card singles