probably been answered already but my search fu is weak

If i have vampirc blood and i kill say 4 models with blast does that net me 4 stamina?

Also it states gain on the card and not recover or replenish or anything so can this take you above your max fatigue?

I don't have any more information than you, but my assumption would be that it gives 1 fatigue for every kill (even if you get multiple kills with a single attack), and that your current fatigue can never exceed your maximum fatigue unless something explicitly allows it.