Wikia

Blessing of Might
Blessing of Might 30 yd range 5.0% of base mana Instant cast Places a Blessing on the friendly target, increasing mastery by X. If the target is in your party or raid, all party and raid members will be affected. Players may only have one Blessing on them per Paladin at any one time.
Usable by
Class	Paladin
Properties
Type	Utility
School	Holy
Cooldown	(GCD 1.5 sec)
Level required	81
Related buff
Magic Blessing of Might Mastery increased by X. Duration: 1 hour
TCG image

“

Bestowed upon the worthy, increased might can facilitate great deeds.

”

Blessing of Might is a core paladin ability learned at level 81. It increases mastery.

Patch changes

Patch 5.3.0 (20-May-2013): Blessing of Might had its mana cost reduced to 5%, down from 22.3%.
Patch 5.0.4 (28 August 2012): The attack power and mana regeneration were removed and replaced with increasing the character's mastery.
Patch 4.3.0 (29-Nov-2011): The melee attack power bonus from this raid buff has been increased to 20%, up from 10%. The ranged attack power bonus remains 10%.
Patch 4.0.6 (8-Feb-2011): The mana costs of Blessing of Might and Blessing of Kings have been increased by approximately 217%, making them roughly equal to the cost of Mark of the Wild.
/ Patch 4.0.1 (12-Oct-2010): [Blessing of Wisdom] and Blessing of Might are combined, increasing attack power by 10% and granting a various amount of mana regeneration.
Patch 3.3.0 (08-Dec-2009): The buff will be stored in a Consolidation Box when received. It will come out when 1 min. is left.
Patch 3.0.3 (04-Nov-2008): Rank 8 points increased slightly to prevent from being overwritten by Battle Shout 8 that has a shorter duration (also applies to Greater Blessing of Might 3.)
Patch 2.0.3 (09-Jan-2007): "Blessing of Might" now also increases ranged attack power.