Sample Pikachu 2002 e-Reader Sample Set ($12,500) e-Reader was a system created for the Nintendo Gameboy Advance that allowed players to insert it into the game slot system and swipe e-Reader cards to unlock special events, characters, or play minigames
Though this Gideon's 0 ability is a standard temporary indestructible creature transformation we expect from the character, its -10 can potentially be used to close out a game, providing each of your creatures with +2/+2 while tapping down each of your opponent's creatures
Still, the prices for those can run from, say, $50 for a Raging Bolt Ex from the recent Temporal Forces Pokmon set to over $29,000 for a rarer Charizard from the original base set
You can get to a couple free creatures pretty easily, just look at Jolene, Plundering Pugilist, Scuttling Butler, and Hewed Stone Retainers