From wow.incgamers.com

Statistics

Talent Improvements

Discipline Tree

Talent: Inner Focus
Effect: When activated, reduces the Mana cost of your next spell by 100% and increases its critical effect chance by 25% if it is capable of a critical effect.
Statistics: N/A

Threat Level

This skill 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.