op12 booster box One Piece TCG: Legacy of the Master [OP-12] depicted in the original work One Piece TCG Legacy of

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

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

Special Summon 1 "Obelisk the Tormentor" from your hand or GY, and if you do, it is unaffected by your opponent's card effects this turn

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