most valuable pokemon trainer cards 5 Full Art Card Lot - X1 Secret Rare, X4 Full Art Etched Top 50 most expensive Pokemon

There are only eight copies of this card in existence

It also works well with Yawgmoth's Will in tandem with cards such as Lion's Eye Diamond for storm decks to generate a bunch of mana quickly

Older cards don't have a set code so, you need to know the symbol for each set to be able to tell on-sight, but a quick search over on Gatherer can help you out when youre not sure

Sources: TCG Player (Base Set Mewtwo, First Edition Rocket's Mewtwo, Mew & Mewtwo GX, Mewtwo ex, Mewtwo Gold Star, Rocket's Mewtwo ex, Shining Mewtwo, Mewtwo e-Card, Rocket's Mewtwo [Winner], Mewtwo [XY Evolutions Staff Prerelease]), PriceCharting (Base Set 1st Edition Shadowless Holo Mewtwo, Mewtwo Gold Star)

Introduced in Alara block in 2003, these show up in approximately 1 in 8 Draft Boosters