Competent! The enemy designs are cute.
Does the "+Fire / –Atk" and "+Atk / –Fire" add 1 and subtract 1? I'm not sure why I would choose a +0 overall if I have the option for a +1 upgrade.
Congratulations on the submission!
"+Fire / –Atk" adds a lot more fire than just "+ Fire", and the opposite for "+Atk / –Fire"
That's good to know! It was a bit ambiguous; maybe it could read something like "++Fire / –Atk", or something else to clearly denote that more is being added.