diff --git a/src/game/SpellAuras.cpp b/src/game/SpellAuras.cpp
index ddc87b01c..278edf214 100644
--- a/src/game/SpellAuras.cpp
+++ b/src/game/SpellAuras.cpp
@@ -7023,8 +7023,12 @@ void Aura::PeriodicDummyTick()
         {
             switch (spell->Id)
             {
+                // Killing Spree
                 case 51690:
                 {
+                    if (caster->hasUnitState(UNIT_STAT_STUNNED) || caster->HasAuraType(SPELL_AURA_MOD_FEAR))
+                        return;
+
                     std::list<Unit*> targets;
                     {
                         // eff_radius ==0
@@ -7057,15 +7061,29 @@ void Aura::PeriodicDummyTick()
                     caster->CastSpell(target, 57841, true);
                     return;
                 }
+
                 // Master of Subtlety
 //                case 31666: break;
-                // Killing Spree
-//                case 51690: break;
                 // Overkill
 //                case 58428: break;
 //                default:
 //                    break;
             }
+            // Prey on the Weak
+            if (spell->SpellIconID == 2983)
+            {
+                Unit *target=caster->getVictim();
+                if (target && (caster->GetHealth() * 100 / caster->GetMaxHealth() > target->GetHealth() * 100 / target->GetMaxHealth()))
+                {
+                    if(!caster->HasAura(58670))
+                    {
+                        int32 basepoints = GetBasePoints();
+                        caster->CastCustomSpell(caster, 58670, &basepoints, 0, 0, true);
+                    }
+                }
+                else
+                    caster->RemoveAurasDueToSpell(58670);
+            }
             break;
         }
         case SPELLFAMILY_HUNTER:
diff --git a/src/shared/revision_nr.h b/src/shared/revision_nr.h
index 74f023189..38002310a 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 "8575"
+ #define REVISION_NR "8576"
 #endif // __REVISION_NR_H__