The only visual difference between a 1st Edition card and a plain shadowless card is the "Edition 1" stamp on the lower left of the artwork
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One other thing of note is youll know if a player is going to attack you or not before they do: they must pay at the beginning of combat, which gives you a chance to use removal before they get an attack trigger
Abyss Eye costs three Darkness Energy and Knocks Out the opponent's Active Pokemon outright if it is affected by any Special Condition, which pairs with Special-Condition support to force removal
Of the five "base" color combinations combining adjacent colors, this is, by far, my favorite combination for drafting a generic unknown environment such as a random Cube, as well as Abedraft, a draft with every card ever printed