diff --git a/src/game/SpellEffects.cpp b/src/game/SpellEffects.cpp
index 1cf529418..74d53adcb 100644
--- a/src/game/SpellEffects.cpp
+++ b/src/game/SpellEffects.cpp
@@ -6606,6 +6606,20 @@ void Spell::EffectScriptEffect(SpellEffectIndex eff_idx)
                     unitTarget->CastSpell(unitTarget, 27699, true);
                     return;
                 }
+                case 28374:                                 // Decimate (Naxxramas: Gluth)
+                case 54426:                                 // Decimate (Naxxramas: Gluth (spells are identical))
+                case 71123:                                 // Decimate (ICC: Precious / Stinky)
+                {
+                    if (!unitTarget)
+                        return;
+
+                    float downToHealthPercent = (m_spellInfo->Id != 71123 ? 5 : m_spellInfo->CalculateSimpleValue(eff_idx)) * 0.01f;
+
+                    int32 damage = unitTarget->GetHealth() - unitTarget->GetMaxHealth() * downToHealthPercent;
+                    if (damage > 0)
+                        m_caster->CastCustomSpell(unitTarget, 28375, &damage, NULL, NULL, true);
+                    return;
+                }
                 case 28560:                                 // Summon Blizzard
                 {
                     if (!unitTarget)
diff --git a/src/shared/revision_nr.h b/src/shared/revision_nr.h
index 4403b7a40..caa218fb7 100644
--- a/src/shared/revision_nr.h
+++ b/src/shared/revision_nr.h
@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "11955"
+ #define REVISION_NR "11956"
 #endif // __REVISION_NR_H__