Whenever you deal damage to a target with Fists of Fury, you gain a stack of Chi Energy up to a maximum of 30 stacks.
Using Spinning Crane Kick will cause the energy to detonate in a Chi Explosion, dealing (65% of Attack power) damage to all enemies within 8 yards. The damage is increased by 5% for each stack of Chi Energy.
Runecarve on: Legs, Back
Source: Drop: Torghast, Tower of the Damned. The Soulforges, Layer 3+
Requires: Monk (Windwalker)