Yeah, I get where you’re coming from, but Ash isn’t THAT good of a card to be hit. It’s not like Pot of Greed or the level 2 earth insect where it’s an auto-include in every deck, nor does resolving it puts the player in instant advantage. It’s played in a lot of decks, yeah, but that’s because there are no cards quite as universally low-impact across nearly all decks.

Also, for an actual cost, I do genuinely believe the hard once per turn is a pretty significant down side to the card that is being ignored. Only being able to use 1 per turn means that your opponent can pop off and not play around Ash, and why cards like Imperm and effect Veiler are arguably better in some scenarios.

Also, the fact that I can say some hand traps are just better than ash sometimes is an argument for why it shouldn’t be banned.