Increases the range of your offensive Shadow spells by X%.
Shadow Reach is a shadow talent that increases the range of all shadow spells. This allows the shadow priest are more far distance before the enemy reaches them.
Vital to both PvE and PvP. In PvE, lets you engage from farther away and Flay a mob more before it reaches you; in PvP, simply increases the range of all your offensive spells, a necessity in an environment with constantly moving targets.