Yeah download slashMO. Look at...

Life = var (somevar)

on each attack.

Then look at the file named AI.cns. Then look at all the code. Especially the parts about player life and fatalities begin. He even gives them a title so even you can figure it out.

I mean I could do all that for you, but then I would be bitching about you being a lazy bastard for making me look for the character, copy and paste the code, and hit submit when you are perfectly capable of doing the same.