All the showdown cards are too wordy. I need to fix that, or accept it's unusable. But I want to test them first.

It's not ideal for blue that you have to attack before finding out if it's unblockable. But it tones it down for common, works with the flavour, makes showdown more exciting, and will often be reasonably good either way.

There's probably much too much showdown at common, it will get annoying faster than clash as you constantly have to decide. But I want to try it and then tone it down, rather than having too little and not notice.