The best way to spot this is by comparing the card to a genuine one
What makes a Pokmon card good: It needs to be in the right context As I am writing this, Radiant Yveltal comes to mind
Nenya, known as the ring of water, is capable of preserving and protecting things. This was wielded by Galadriel and was concealed from Saurons gaze throughout the story
I would certainly include this in my own discard decks, as it gives me an easy way to scale lore while I wait for my more high powered discard cards to take effect
Just be sure to check the measurements of your space, the bins you'd like to use, and maybe even what you plan to store in the bins so that it all fits properly
Including some of the top colorless cards MTG players utilize for utility can also help smooth out your mana production or provide generic answers that your specific colors might lack