It was increasingly difficult to combat these effects, and it wasnt helped by a series of bad card draws on the good guy side
That one will almost certainly be a chase card
But I would move Serperior into play if you are late in the game and you get a grass Pokemon on your bench that you really want to use right away, you could then use Serperior's Leaf Tornado and get the necessary energy cards on that Pokemon you just put on your bench and retreat Serperior the next turn for only one energy and put that Pokemon into play with the necessary energy cards on it
This unofficial PokMetal card features everyone's favorite electric mouse with a, shall we say, amplified physique
Similarly to Seven Dwarves from Throne of Eldraine, Nazgl allows players to break a formats deckbuilding rules
Any sort of Overrun effect without a way to push damage through is always a little suspect, though, so I don't think this will be a serious player, but giving all your creatures +10/+10 is pretty iconic