Improved Retribution Aura was a talent in the Retribution tree, you would need to spend 17 points in Retribution to max it.
Notes[]
For the Paladin who uses Retribution Aura, this talent improves its damage. However, such improvement is so trivial even at max rank, so most experienced tankadins do not spec it.
Patch changes[]
Patch 3.1.0 (2009-04-14): This talent has been removed.