+55 Weapon Power
+35% Attack Speed
Passive: Gain 10 weapon power for every 140 weapon damage done to enemy heroes. +5/10 (Melee/Ranged) damage needed for each stack thereafter. 25 stacks max. Decays 2 stacks per second after you've stoppped stacking for 2.5 seconds.
(Very weak at first, but becomes extremely powerful over the course of long battles.)