It didnt introduce anything revolutionary, as it was the basic set, but it has more than a dozen EX Pokemon across all three booster packs
Series: Pokemon Card Game Scarlet & Violet
1x Foil Felidar Sovereign
It has both an Ultra Rare and Special Illustration Rare version in addition to its standard Double Rare version
(Though I'll note that sticking with the previous build, in many cases, is better if you're really unsurebut that's another article entirely.) It's a bit of a meta thing to do, but if your goal is to give yourself the best chance while reducing risk, the halfway point is always an option to considerthough far from automatically always the right one
There are a number of reasons that a deck could be flagged as invalid, including not having enough cards to meet the minimum number required or too many cards over the allowable maximum