yugioh ancient gear structure deck Amazon.com: Yu-Gi-Oh! - Workshop (SD10-EN017) - 10: Machine Re-Volt - 1st Edition This is of the Ultra Rare rarity Ancient Gear Gadget - SR03-EN000

Released as a Black-Star Promo card by Wizards Of The Coast, players could get this card by participating in a competition to create your own Pokemon Card

They do this by making the rewards for playing in events better then simply using the gold to buy stuff in the shop and it is not based on winning anything in these events

The bonus card for Shadows Over Baldurs Gate , the Prosper, Tome-Bound drop, is even worse

The more linear the strategy (i.e., the more it encourages you play a certain subset of cardsfor more on what this R&D vocabulary means, read this article), the easier this is

These cards also appear in non-foil in Collector Boosters