Priest · Shadow Magic · tier 3 · from level 20

Improved Mind Blast

Rank 5/5

Reduces the cooldown of your Mind Blast spell by 2.5 sec.

Doesn't change the damage or healing of any Priest spell.

Averages, counting crits and misses, for a level 60 Priest with a typical weapon and no other gear or buffs, against a target your level. Worked out from the game's own data, the same way as the Foresight addon.