most valuable 2016 pokemon cards Magikarp - 33/108 2016 XY: Evolutions Pokemon Cards

In addition to those six cards, we've also got a first look at two "Source Material" cards, which can be found in main set booster packs but are only legal in formats where they were already available

When this creature dies, shuffle it into its owner's library, then scry 2

Put these two things together, and the most obvious answers are Uro, Titan of Natures Wrath and Kroxa, Titan of Deaths Hunger from Theros Beyond Death

ETBs were selling for three, four, five times their MSRP

A flurry of desirable expansions were released around that time, and coupled with the nostalgia of the Celebrations set, popularity exploded

Formats like Commander and Pauper started out as fan variants that eventually built up enough steam to get official recognition