Usually, fake cards, especially foils, can feel very slippery and soft, while regular cards have a texture thats hard to reproduce by regular means
but the hastily pasted errata makes sure that, no, you can't get your opponent to buy the most expensive cocktail in the nearby restaurant through a card game
Whenever an opponent casts a spell, that player loses 5 life unless they discard a card
The difference between costing three and costing two is a lot
I spoke with the SQUARE ENIX's project team about this idea (and they were so willing to hear me out
The cards' concept was that they essentially used energy to change the color of a spell being cast or a permanent in play with the concept being that players could do something like playing Thoughtlace on an opponent's spell to turn it blue so they can counter it with a Red Elemental Blast, or do a surprise change of color to a permanent for "protection from" purposes