12-24% Rending on Enemy Weak Spot Hit for 3.5s. Stacks 5 times.
5-8% Strength for 4.5s on Kill. Stacks 5 times.
4.5-6% Close Range damage on Repeated Hit. Stacks 5 times.
Gain 7-10% Close Damage for 3.5 seconds after killing an enemy at close range, stacking 5 times.
Scrier's Gaze has a 19 second cooldown (18 with Seer's Presence) which I find very amusing. Probably very helpful for Havoc, too, but I'm not an expert.