op12 booster box One Piece TCG: Legacy of the Master [OP-12] language box contains 24 booster packs One Piece Card Game OP-12

It just kind of depends on what you can afford, what you want to be doing with the deck, and of course, personal style

It may have the highest mana cost of the five cards at five mana, but it enters prepared with the Power Nine card Ancestral Recall as its attached spell, meaning you can spend one mana to have a target player draw three cards

Improvise lets you tap your artifacts to pay for generic mana costs, making it so you only need to use colored mana from permanents to cast spells

It sweeps the board

For deck testing, Discord, Lord of Disharmony MTG proxy is useful when you want to see whether your table enjoys the cards randomness, whether the deck needs more protection, and whether Discord creates fun gameplay rather than four people reading random card names into their phones for twenty minutes