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The solar radiation triggered by the apocalyptic event meant everyone had to wear sunglasses all the time. I want to say it also had some rock star in it but I'm not sure. I stumbled on only a couple of scenes probably 10 years ago.
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I used to read this webcomic back then, and wondered if I ever finished it.
If I remember right the comic was in black and white, or not very much color. The character wasn't Harley Quinn. At one point she gives someone a lesson in playing poker?
If the comic is gone, maybe I can use the wayback machine to read it?