You can use any 20 of your cards in a deck, but note that its no use putting non-Basic Pokmon in there if you dont have their Basic form to evolve from, no matter how powerful they are
The Sky-Dwelling Exceptions in Green Green is not renowned for its flying entities, yet it holds unparalleled mastery over countering them
Thundermane Dragon is thundering out of the eye of the storm, bringing with it all manner of creatures power 4 or greater from the top of your library
Nekusar, the Mindrazer + Spiteful Visions + Scrawling Crawler Ive separated out Nekusar, the Mindrazer, Spiteful Visions, and Scrawling Crawler from the other pingers, since these cards come with the extra draw text
This list has added five new entries, including some rarer and even more expensive Charizard Pokemon Cards
Time has shown us that players like some forms of milling, basically the ones where you mill your opponent