(but again, technically, nothing prevents you from preparing 10 versions of the same deck for different matchups... I won't even mention the surprises in the spirit of "aha, I played the first game with a neutral rune deck, lost, and picked a dirt rune deck for the next game to counter the matchup")
(but again, technically, nothing prevents you from preparing 10 versions of the same deck for different matchups... I won't even mention the surprises in the spirit of "aha, I played the first game with a neutral rune deck, lost, and picked a dirt rune deck for the next game to counter the matchup")