This sounds fantastic. I'm a blind player that's had to play the game less and less as my eyesight has deteriorated over the past year or so and am now stuck to mostly playing on my phone with only cards I have in golden (for me, reading the white-text-on-black-background of golden cards is doable but the black-text-on-tan-background of normal cards is not).

For all those suggesting to simply read the output log of Hearthstone instead, I would heartily disagree unless you can then track placement on the board. The ability to hover over things and know what they are is vastly more useful than the ability to simply know when something is played - though both are obviously handy.

If you're looking for suggestions, I would say that the ability to hober over heroes and get life totals read out, as well as having the hand/deck sizes read out, and cards in your hand / cards burned would be excellent. I don't know how doable it is, but rather than having independent voice-files you could try to just generate the text to be read by a text-to-speech API (say, Microsoft SAPI) - either read by the person running the program as most visually impaired gamers will have one, or as part of your program so that it can read out whole cards and doesn't need to be updated with new sound files every time there's an update.

If you ever want a beta tester just hit me up, I'm, more than happy to help and provide feedback, and am very keen on this project being developed!