https://www.wowhead.com/spell=459730/huntmasters-call

src/server/scripts/Spells/spell_hunter.cpp

@@ -144,6 +144,10 @@ enum HunterSpells
     SPELL_HUNTER_DIRE_COMMAND = 378743,
     SPELL_HUNTER_DIRE_BEAST = 120679,
     SPELL_HUNTER_DIRE_CLEAVE = 1217524,
+    SPELL_HUNTER_HUNTMASTERS_CALL = 459730,
+    SPELL_HUNTER_HUNTMASTERS_CALL_COUNTER = 459731,
+    SPELL_HUNTER_HUNTMASTERS_CALL_HATI = 459738,
+    SPELL_HUNTER_HUNTMASTERS_CALL_FENRYR = 459735,
 };
 
 enum MiscSpells
@@ -1106,6 +1110,34 @@ class spell_hun_dire_beast : public SpellScript
 
             controlled->CastSpell(controlled, SPELL_HUNTER_BEAST_CLEAVE_BUFF, args);
         }
+
+        // 459730 - Huntmaster's Call: summoning a Dire Beast N times summons Hati or Fenryr
+        if (player->HasAura(SPELL_HUNTER_HUNTMASTERS_CALL))
+        {
+            SpellInfo const* counterInfo = sSpellMgr->GetSpellInfo(SPELL_HUNTER_HUNTMASTERS_CALL_COUNTER, GetCastDifficulty());
+            int32 needed = counterInfo ? int32(counterInfo->StackAmount) : 8;
+            if (needed < 1)
+                needed = 8;
+
+            Aura* counter = player->GetAura(SPELL_HUNTER_HUNTMASTERS_CALL_COUNTER);
+            int32 current = counter ? counter->GetStackAmount() : 0;
+
+            if (current + 1 >= needed)
+            {
+                player->RemoveAurasDueToSpell(SPELL_HUNTER_HUNTMASTERS_CALL_COUNTER);
+
+                // Hati or Fenryr
+                uint32 summonId = urand(0, 1) ? SPELL_HUNTER_HUNTMASTERS_CALL_HATI : SPELL_HUNTER_HUNTMASTERS_CALL_FENRYR;
+                player->CastSpell(player, summonId, TRIGGERED_FULL_MASK);
+            }
+            else
+            {
+                if (counter)
+                    counter->ModStackAmount(1);
+                else
+                    player->CastSpell(player, SPELL_HUNTER_HUNTMASTERS_CALL_COUNTER, TRIGGERED_FULL_MASK);
+            }
+        }
     }
 
     void Register() override