Caveat... This came up in my last game of the night and I was definitely a bit into my cups at that point so....
My opponent rolled 4 green dice, all blanks. He had two focus assigned. He immediately declared that he is spending a Focus. This was to allow an upgrade to kick in, for the life of me I can't recall which one. But I believe the wording is "when you spend a focus..."
I questioned hte validity of spending a Focus to do nothing as there was nothing there to spend the Focus on. The reply was that you can spend a Focus to change zero results.
Why I haven't come across this despite playing almost weekly is weird or just the sudden clarity of alcohol...
so my question is simply can you spend, or I guess expend a Focus to literally do nothing so you can trigger an ancillary upgrade?
Eric J