The North American competition included Canada, USA and Mexico, whereas Oceania/Europe was open to residents of Australia, New Zealand, the United Kingdom, Ireland, Austria, Germany, Switzerland, Belgium, France, Luxembourg, Portugal, Spain, the Netherlands, and Russia (Italy is specifically excluded) [source]
Previous variants of the walk ability punished players running specific colors of mana, but Plain Walker has beef with any players daring to stack their libraries with Planeswalker cards, such as decks headed up by Commander Masters Commodore Guff
Equally, the games solution of re-fighting the same characters ad nauseum to gather better cards does little to break down the frustration factor of random card selection that can often leave you with zero chance of victory
The structure is a three-layer sandwich: A front paper layer that holds the printed card face and art An opaque colored core in the center (typically blue) A back paper layer for the card back This blue core is important
The copied version is now a token, but thats almost as good, especially in Commander