As an AoE damage spell, the DPS aefficiency of Consecrate is greatly increased for every enemy within the area. It is also a great way to deal damage to multiple enemies. Both of these factors make it an excellent spell for tanking.
Hotfix (2016-07-25):Fixed a bug that was interrupting player loot windows when Consecration was active.
Patch 7.0.3 (2016-07-19): Now available to all specializations. Mana cost removed.
Patch 5.2.0 (2013-03-05): Base damage increased by 789%, and now scales less efficiently with attack power by approximately 11%.
Patch 5.0.4 (2012-08-28): Now a Protection specialization ability. Duration reduced from 10 to 9 seconds.
Patch 4.0.1 (2010-10-12): Consecrate now lasts 10 seconds but has a 30-second cooldown, and works with Holy Power instead of spell power. Major talent-tree revamps have eliminated many of the talents that formerly improved Consecration's performance. Many of the items that used to affect Consecration no longer have those attributes.