So, if it hits you, it'll heal you of 2-4 hps damage? And a critical could heal up to 12hps? Oh, wait, is that -5 just the Str modifier, and not multiplied, so a critical could do as much as 4hps damage?
It is the strength modifier, and strength modifiers are multiplied even if negative. But yes, that can deal up to 3 points of damage on a successful crit. I figure the little bugger jumps up and gnaws on your jugular.
