AUTO-EQUIPS ARE KEY The first consideration should be to play Equipment that auto-equip when they enter
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For one player it sure is
Syr Konrad, the Grim FINAL FANTASY: Through the Ages, Uncommon Limited: 4.0 Golbez, Clad in Darkness (Syr Konrad, the Grim) is also a fantastic finisher, and one of those cards that makes the entire game revolve around it when it hits the board
Again, it's not card advantage in and of itself (since you draw three, and then discard three + lose the Coliseum), but it combines famously with Deep Analysis and madness cards (such as Circular Logic), and its effect can't be counterspelled