If we want to spot a fake full art or maybe a fake hyper rare card (the most popular right now on ebay), the best way to find out if a card is a real or a fake, is to use that cards in your hand and try to move your fingers around the art of the card
Look for Watermarks Some Pokmon cards, especially those from the legendary collection and other special sets, have watermarks that can help verify their authenticity
But after his team conquered the entire city of Satellite, Kalin became obsessed with protecting what they worked so hard to obtain, and grew paranoid into believing that any Duel Gangs not under his control were a threat to the order they had brought
illustrations "Yu-Gi-Oh's Kazuki Takahashi Launches Advent Heroes Game"
Lastly, while I've got you here: for anyone that would prefer to start their 40-card experience with Sealed Deck (and/or doesn't know what that term even means) make sure to check Jeff Cunningham's archive for the best Sealed Deck introduction series I've ever seen anywhere