Blessing of Kings

Blessing of Kings is baseline Protection spell learned at level 22 for.

Greater Blessing of Kings
Paladins also have Greater Blessings, which includes a Greater Blessing of Kings which can be learned (purchased) from the Class Trainer. Each Greater Blessing affects all players of the targeted class within your party or raid and lasts for 30 minutes (as of patch 2.2).

Each Greater Blessing you cast requires the reagent Symbol of Kings which can be purchased at any reagent vendor.