Legal sets: A/B/U, Arabian Nights, Antiquities, Legends, The Dark, Fallen Empires, Homelands, Ice Age, Alliances + the promotional cards
Since it will get a +1/+1 counter every time an opponent plays a spell, you can expect it to grow by at least 3/3 each turn
The "Bystial" monsters work well with this Deck, giving it access to Level 10 Synchros like "Bystial Dis Pater", "Chaos Angel", and "Baronne de Fleur" ( OCG only) while acting as disruption against LIGHT/DARK Decks - including being able to trigger the Synchro effect of "Stand Up Centur-Ion!"
The Most Valuable Cards in Modern Horizons 3 Some players are truly cutthroat, hoping to win every match of Magic they play