Ink splatters, but with the right colour, and right touch, some of these brushes would look great as blood as well.
There are 29 brushes, from ~550px wide to ~2300px wide. (I made these brushes so I could use them in print work, but they do downsize nicely with some help from the unsharp mask filter.) PhotoShop 7/Win only.
If you decide to use my brushes in your art, please credit me by name ( *digifox
) and link. And please note/message me so I can see your handiwork!