60% Strength on your First Attack every 3.5-5 seconds.
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.
