There is the official Pokmon Trading Card Database, which will help you spot any text or stat differences, but isn't great for differentiating colors (since your monitor may not precisely match the colors a printed card would appear in your room), and of course it can't help you with determining the feel of the card
Kydele, Chosen of Kruphix might not seem really powerful, but being able to run additional draw spells to try to set yourself up to be able to tap Kydele, make some extra mana, and then cast the 8-CMC Brinelin makes sense to me
bulbapedia.bulbagarden.net Pewter City Gym (Gym Heroes 115) - Bulbapedia, the community-driven Pokmon
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In addition to his role at Total Escape Games, Jason serves as the President of JTJ Holdings, Inc., where he focuses on mentoring emerging entrepreneurs and small businesses within the tabletop gaming industry to foster growth and innovation