Considering the main strategy of this deck, it goes without saying that adding more Princesses on top of the Queens Sensor core can be a good idea to improve the efficiency of your strategy
While some might argue you should do this second, looking at your decks composition gives you a better idea of which colors you need more access to, which will help narrow down what you should be considering
Confusing Card Advantage Unlike many counterspells, Arcane Denial actually increases the number of cards in hand for all players
The last card is an art card, which is not a game piece but includes blown-up versions of card art
However, despite the other shiny toys that have come out since then, Mew VMAX and Genesect V remain absolute powerhouses
There's no upkeep cost and no way around it with the exception of removing Moat itself