Patch 10.0.7 (2023-03-21): Now provides less Holy damage bonus per point in Mastery.
Patch 9.0.1 (2020-10-13): Now learned at level 10 (was 78).
Patch 8.0.1 (2018-07-17): Reintroduced and redesigned. Now increases all Holy damage.
Old: Your Crusader Strike, Hammer of the Righteous, Hammer of Wrath, Templar's Verdict, Divine Storm, and their multistrikes deal 17.0% additional damage as Holy damage.
Patch 6.2.0 (2015-06-23): Effectiveness reduced by 6%.
Hotfix (2014-10-16):Additional damage dealt has been increased by 20%.
Hotfix (2013-06-04):Mastery: Hand of Light was dealing less damage than intended. It now deals the proper amount of additional Holy damage.
Patch 4.0.6 (2011-02-08): Redesigned: A percentage of the damage done by Templar's Verdict, Crusader Strike, and Divine Storm is done as additional Holy damage. This Mastery now grants a 2.1% increase to Holy damage per mastery, down from 2.5%. Old functionality moved to [Divine Purpose].
Old: Your autoattacks have a 8% chance to grant Hand of Light, causing your next Holy Power ability to consume no Holy Power and to cast as if 3 Holy Power were consumed. Each point of Mastery increases the chance by an additional 1%.