You see, when you attack with Ghalta and Mavren out, you get two options to choose from as an attack trigger
Card Set(s) -ONE PIECE CARD THE BEST- [PRB-01] CARD VIEW OP05-082 | R | CHARACTER Shirahoshi Attribute Wisdom Block Icon 2 Effect [Activate: Main] You may rest this Character and place 2 cards from your trash at the bottom of your deck in any order: If your opponent has 6 or more cards in their hand, your opponent trashes 1 card from their hand
It reads, Whenever a player plays a spell that counters a spell that has been played or a player plays a spell that comes into play with counters, that player may counter the next spell played or put an additional counter on a permanent that has already been played, but not countered. Although its obviously tongue in cheek, I appreciate this card as an admission statement, or rather, a concession against the inevitability of using unclear language in the game
Please comply
If all you buy is singles and these all arrive by mail, and you sort your mail at the dining room table, have somewhere to store your cards in that general area until you have time to sort