one piece op 8 booster box TCG: Royal Blood Korean (OP-10) Big Mom Pirates as purple One Piece Two Legends Booster

However, it is important to mention that you are not really gaining any tempo from this trade, since when you take a card from your opponent's hand, they are never spending their mana to cast it (unlike a Counterspell, for example, which has a weird Time Walk effect on the opponent, since you not only stop the spell but also force your opponent to spend mana attempting to cast it)

Any stronger and people would question it

Its a marriage of two of gamings most beloved fantasy realms, and with absolute legions of fans of both Magic and Final Fantasy to please, it has to hit the highlights and mechanical flavoring of 16 mainline games worth of viable cards

This means you could put this mana into something like Urza's Ruinous Blast or Karn's Temporal Sundering at a pivotal moment