Ill bet you are thinking of the 10 true fetch lands from Onslaught and Zendikar
The background immediately behind Hydreigon is multicolored, possibly referencing the visual effect from the video games that takes place when a Shiny Pokmon enters the battlefield
These issues become easier to notice when comparing suspicious cards beside verified originals
BT10-031 C Digimon Lv.3 Pulsemon Color Yellow Cost 3 DP 2000 Digivolve Cost 1 Yellow 0 from Lv.2 Form Rookie Attribute Vaccine Type Beastkin Card Text 1 [Special Digivolution Condition] [Digivolve] 0 from [Bibimon] [Effect] [Opponent's Turn] While you have 3 or fewer security cards, this Digimon gains Blocker
If you customize a decks coins, sleeves, or playmats, youll only see the changes when you enter a match with that specific deck
Also, its basically like an Alakazam, but way faster for being a Stage 1 card