From wow.incgamers.com

Statistics

• This skill requires the Omen of Clarity Talent

Talent Improvements

Restoration Tree

Talent: Omen of Clarity Talent
Effect: Imbues the Druid with natural energy. Each of the Druid's melee attacks has a chance of causing the caster to enter a Clearcasting state. The Clearcasting state reduces the Mana, Rage or Energy cost of your next damage or healing spell or offensive ability by 100%. Lasts 30 min.
Statistics: N/A

Threat Level

This skill causes no amount of Threat.

Uses in PvP

Please feel free to add a bullet list of uses within PvP or editorial if you have more to say. What use is it against other builds, what skills can it be used to counteract or prevent. What skills does it work well in combination with.

Uses in PvE

Please feel free to add a bullet list of uses within PvE or editorial if you have more to say. Which creatures/bosses in particular is it useful against. What skills does it work well in combination with.