Mirror Image in Combat

Trying to come up with a macro that queries the number of images the target has and then roll that number + 1 as a die roll. For example, the target has 4 images. The query input would be 4 and the macro would roll d5 to determine whether an image or the actual target was struck (i.e. a result of a "1"). Read through the Advanced Macro wiki and didn't find an answer there. Thanks.

I think I found my answer by trial and error. /w GM ?{# of Images} [[1d(?{# of Images}+1)]]

If you have a spare token bar on that character, you could make a custom attribute like "images" and link it to that bar to make tracking the remaining images easy.  Then you could have a macro that used that value to generate your dice: [[1d[[@{Bob|images}+1]]]]. I suppose it could be done without making an attribute also.  Just use selected or target with the bar (alter for whichever bar you use: [[1d[[@{target|bar3}]]]]. Edit: I guess I misread and thought you already had a query but wanted to go about it a different way.  Oh well, glad you figured it out!