TrinityCore/TrinityCore — pull request #11915 by Numielle (2014-04-20 21:56:00+00:00)
Title: Core/Spells: Fixed double heal reduction on Eart Shield (issue #4032).

The SpellScript for Earth Shield applies healing reducing auras once when the spell is casted on the target and the second time when the buff procs. The suggested code revokes the application of healing reduced auras at cast time which yields the desired behavior.