pokemon rainbow rare gx cards SM Forbidden Light Card: Greninja - 133/131 - Grass Tempest The Most Expensive Rainbow Rare

So not too many of the cards have come across the grading companys radar

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Its On Play/When Digivolving/When Attacking effect can return 1 of your opponent's Digimon to the bottom of the deck when you return 1 Digimon card from their trash to the top of the deck, allowing you to remove your opponent's cards from two areas

Heartfire Hero can very quickly grow in stats, and burn for its power whenever it dies

Thats 2/5 of the deck being LIGHT and 1/5 being DARK, meaning its likely that if I mill 5 cards 2 will be a LIGHT monster and 1 a DARK