+12-24% Rending on Enemy Weak Spot Hit for 3.5s. Stacks 5 times.
+10% Critical Chance for every 0.3-0.45 second while aiming. Stacks 10 times. Discharges all stacks upon firing.
+30-60% Rending on Critical Hit.
Example build for Karnak Twins Hard Mode guide: https://steamcommunity.com/sharedfiles/filedetails/?id=3115826337