are world championship pokemon cards legal - 2019 Deck What's the reason these cards

Rules-wise, putting a land into play is part of an effect or ability , and it doesnt count towards the play one land a turn limit. I can put a land into play using Rampant Growth and play a land from my hand, and these are two separate actions

Check for the 1st Edition stamp on the lower left, then whether a Base Set card is Shadowless (no drop shadow on the art box) or Unlimited, whether it is holo, its rarity symbol, and its condition

The Five Moxen Mox Pearl | Illustration by Raoul Vitale Shinyyyyy

I guess you can think of it as similar to a PDF file, at least in terms of scalability and embedding of raster graphic files