These lands excel when you have a base X color deck and want to splash a color Y
For individual cards and older booster packs and boxes, you will just have to gain a lot of experience and learn the nuances of real Pokemon products and then make educated purchases, ideally with a means of recourse if it turns out you were scammed (some kind of buyer protection program, etc)
It's also big
The reminder text on top doesn't count, then there's five lines in chapter I, four lines in chapter II, and seven lines in chapter III
There are cards on both faces.") DFCs create a lot of controversy when we first announced them, but once the product came out, they were quite popular
From the tabletop to Arena, milling your opponents deck to running a crazy Hive Mind combo, theres always a way to come out on top