Forgot to get the screenshot and its not really a HUGE deal but I thought I would mention it. In my last playthrough I was using a fun life gain deck and ended up beating the final villain - Arzakon with the effect of Felidar Sovereign. A the end of the game, when it usually is supposed to tell you how many years your efforts saved Shandalar for it said something around -375 years. I did do a bit of damage to him too, I got him down to around 250 before accidentally winning. So usually this would still be a positive number even after "losing" and doing 50 damage. As I recall, its supposed to give you one extra year per life you do to him (for a maximum of 300 extra years).

I know for a fact it was a positive number of years prior to the battle with him. And I would imagine that this bug will trigger with any instant-win effect, but I'm not sure. Overall it's not a huge deal, and I'm not sure if there's anything you can do about it, but I wanted to report it anyway in case you're not aware.

Once again thanks for your hard work on this. This has consumed my free time of late and I will continue to post bugs as I find them