Continuously chaining more than 2 attacks gives 2-5% Power. Stacks 10 times.
Up to 5-20% Strength based on the charge time of your heavy attacks. Stacks 3 times.
5-6.5% Strength for 3.5s on Close Range Kill.
Gain 7-10% Close Damage for 3.5 seconds after killing an enemy at close range, stacking 5 times.
Ez money.
Don't brace ever.