oath of the gatewatch booster box but there are only 183 functionally different cards MTG Oath of the Gatewatch

Michael Celani did a great deck tech for Vivi, which you can check out here

Putting these counters on another creature can unlock some strong attacks or give a Commander like Yargle and Multani some very relevant keyword counters

And the digivolving mechanic provides a lot experimentation

Temptation Level 2 provides a nice loot effect to help you draw into cards you need while discarding cards you dont

In Un- games, this also means the text boxes themselves are exchanged, including the flavor text and watermarks in those text boxes

Plus, theres a massive market for trading cards and collectibles, so its no surprise that Yugioh cards are easy to find on the platform