TrinityCore/TrinityCore — pull request #8378 by Ne3x (2012-11-20 21:16:03+00:00)
Title: Scripts/Spells: Fix Unholy Blight not stacking.

Note: As of patch 3.2.0: The damage supposed to accumulate similar to Ignite and Deep wounds.
Source: http://www.wowwiki.com/Unholy_Blight

Closes: #8265

A rewrite of the previous pull request based on Shauren's suggestion.