5-8% toughness on Chained Hit.
Up to 5-20% Strength based on the charge time of your heavy attacks. Stacks 3 times.
20-35% Toughness on Elite Kill.
Target receives 1-4 Stacks of 2.5% Brittleness on direct projectile hit. Debuff lasts for 5 seconds and can have a maximum of 16 stacks.