Shinies in PTCGP aren't functionally any different to regular cards in how they play, but they're a rarer version that's good for bragging rights on your collection
The one-mana mode of Dread Fugue will trade for cards you could have just spent spot removal on (and an Infernal Grasp drawn later will be more useful than a Dread Fugue), where Inquisition of Kozilek can trade for things that youre glad to handle before they resolve
There are also a few cards that count as whatever creature type you need for your party, like Stonework Packbeast, Tajuru Paragon, and Veteran Adventurer
Then, you need to get your high-cost cards like Maui, Demigod, and Simba, Rightful Heir on the board right away, before your opponent has enough ink to answer them
Tools to help evaluate your Gengar cards: Card Value Checker |Condition Guide |Trade Calculator The value of your Gengar card depends on several factors: Based on current market data, these are some of the most expensive Gengar cards: A: Gengar EX cards typically range from $5-50 for common variants, with Full Art and promotional versions worth $20-500+ depending on condition and set