I am not sure how I'll feel about Winter Orb when I put it into play but provided it doesn't get blown up right away, I think it will slow them down but not make them unable to do anything at all
Beast WithinBeast Within - Permanent Removal (770,739 Inclusions, 41% of 1,887,636 Decks) Spot removal is both the most likely thing you're going to have available to copy with Tempt with MayhemTempt with Mayhem, and also the most likely to be copied, in my opinion
What makes Korvold so powerful is that the card is a both a sacrifice enabler and a payoff
However, I don't like the new Mega Hyper Rare cards, the all-gold chase Pokmon cards that were recently added into packs
Remember the Soul cycle
Chase cards such as SAR, Secret Rare, or iconic Pokmon