fix(Core/Spells): Nature's Swiftness should not be consumed by instant spells. (#10909)

src/server/game/Entities/Unit/Unit.cpp

@@ -15817,7 +15817,7 @@ void Unit::ProcDamageAndSpellFor(bool isVictim, Unit* target, uint32 procFlag, u
                     continue;
                 }
 
-                switch(triggeredByAura->GetAuraType())
+                switch (triggeredByAura->GetAuraType())
                 {
                     case SPELL_AURA_PROC_TRIGGER_SPELL:
                         {
@@ -15957,6 +15957,19 @@ void Unit::ProcDamageAndSpellFor(bool isVictim, Unit* target, uint32 procFlag, u
                             break;
                         takeCharges = true;
                         break;
+                    case SPELL_AURA_ADD_FLAT_MODIFIER:
+                    case SPELL_AURA_ADD_PCT_MODIFIER:
+                    {
+                        if (SpellModifier* mod = triggeredByAura->GetSpellModifier())
+                        {
+                            if (mod->op == SPELLMOD_CASTING_TIME && procSpell && (procSpell->GetTriggeredCastFlags() & TRIGGERED_CAST_DIRECTLY) != 0)
+                            {
+                                break;
+                            }
+                        }
+                        takeCharges = true;
+                        break;
+                    }
                     default:
                         takeCharges = true;
                         break;

src/server/game/Spells/Spell.h

@@ -589,6 +589,8 @@ public:
 
     [[nodiscard]] uint32 GetTriggeredByAuraTickNumber() const { return m_triggeredByAuraSpell.tickNumber; }
 
+    [[nodiscard]] TriggerCastFlags GetTriggeredCastFlags() const { return _triggeredCastFlags; }
+
  protected:
     bool HasGlobalCooldown() const;
     void TriggerGlobalCooldown();