so i have a shadow slice with what looks like a mess up in the inking process where it is describing what cipher is there is a big black splotch. im just wondering what its valued at or where i could find out.

Well shadow slice on its own is not really worth much, its tcg high is 60 cents. Print errors tend to drop the price a bit, though some people like the mistakes.

Got a pic/scan?

Either way, inking errors are fairly common. If it was a playable card, it would be one thing, but with it being the card it is, there is likely no premium unless the error is really egregious.