Your health has improved incredibly! You are making it really tough for your enemy to knock you out. This is one of the 4 most rare skills a brute can obtain.
Increases your health stat dramatically.
Also decreases the three main stats by a considerable amount, your brute's skills become weaker when strength, agility & speed are concerned, but you start gaining supers & specialties which are good for defense.
It is possible to get a smaller health increase from this specialty than from Vitality, with a bigger hit to your other stats.