Concussion is a rune effect in [[File:IconCripplingWave.png|leftCrippling Wave]]'''Crippling Wave''' is , a [[Spirit ]] Generating [[Monk skill]] unlocked at [[clvl|Level]] 8.

An This rune effect is enabled at level 26, and adds a large [[Obsidian Runedebuff]] placed in it to the skill, cutting the damage dealt by afflicted enemies.  {{skill description header}}<skill class="Monk">Crippling Wave</skill><skill class="Monk" rune="Concussion">Crippling Wave</skill>   ==Media== Screenshots and videos will alter be added post-release.  ==Development== Prior to the skill in February 2012 rune overhaul, this rune effect was enabled by the following way[[Obsidian Rune]].