But we also know that there are players looking for more variety and challenge, for a format where balance problems can be swiftly corrected without needing to ban cards or eliminate whole decks, and now they will have a format built for them
In terms of Nidos, I've only seen these three, all from the Pikachu deck
You might still find it secondhand from a reputable seller on eBay, but prices are upwards of 60
At the same time, cascade is a cast trigger, meaning that it goes on the stack once you cast the card
Due to differences in scan saturation and other similar factors, it can be pretty difficult to differentiate between the two online, but the difference should be pretty noticeable side-by-side, more so than the standard deviations in print color of any set