"For example, in Tempest I came up with the idea of making the common X direct damage spell have two red mana to make it harder to splash." - Are you telling me that Rolling Thunder was almost a strict upgrade to Fireball before you had that revelation?

I had the idea *before* I designed Rolling Thunder.

I did a search in Gatherer for common non-creatures in BFZ and Rolling Thunder came up. I know the card did well at the Community Cup, is someone trying to push for its advance? Or is it just a bug in Gatherer? ≈}

The reason it shows up was because it does exist as a common card, in Tempest where it first showed up.