[MasterNuke]

Hmm... how bout...
It be named something like Frenzy or something like that
A skill that all but Alchemists use...
Temporary + to Str and Constitution... but a tremendously bad drain of hunger
It can only be activated at 20% hps
You return to normal if you are killed or at 90% hps
At the end of it... your fatigued and take penalties on speed, Str, Dex, Con, and Pow.
The chance of pulling a frenzy off depends on your Physique level... maybe... %chance = (2*cLvl)+25

Just my 2 cents... since I lost track around 11...