Will M. Baker
Not a real expansion.
It's thunderstone with numenara theme form kickstarter numenara RPG bonus.
I don't think you can mix this if you really care about theme and numenara artwork mixed into your deck. If you just play counting numbers I think it will be ok since it will have the layout of thunderstone advance.
I think it's premature to write off the theme as incompatible, without seeing the specific artwork on the Numenera cards. Just because it has sci-fi elements doesn't mean it won't be primarily fantasy themed. Once we start seeing card previews we'll all have a better idea of how the art sits with our individual sensibilities.