+5-8% toughness on Chained Hit.
+7.5-15% Weak Spot Damage. Weakspot Kills also ignore Enemy Hit Mass.
+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.