In the rare case where enough -1/-1 counters are put on Aerith Gainsborough at the same time to make its toughness 0 or less, the number of +1/+1 counters on it before it got those -1/-1 counters will be used to determine the value of X in Aerith Gainsborough's third ability
To do this, some decks set up plays where they can take down multiple Pokmon in a turn, occasionally taking all six prize cards in one turn if the board has been set up properly
So here is a breakdown for those
Like control decks, midrange decks will gain incremental advantages over the course of the game, but where they differ is that midrange apply pressure to the opponent at all stages of the game, not just towards the end
Teysa Karlov doubles all your triggers, making every death a massive event
Platinum Broken Time Space The mother of all Stadiums