Some fixes from the ports.

Source/Framework/Util/CollectionExtensions.cs

@@ -180,6 +180,12 @@ namespace System.Collections.Generic
         {
             Array.Clear(array, 0, array.Length);
         }
+
+        public static void EnsureWritableListIndex<T>(this List<T> list, uint index, T defaultValue)
+        {
+            while (list.Count <= index)
+                list.Add(defaultValue);
+        }
     }
 
     public interface ICheck<in T>

Source/Game/Collision/Callbacks.cs

@@ -282,7 +282,7 @@ namespace Game.Collision
         public GameObjectModel GetHitModel() { return _hitModel; }
 
         PhaseShift _phaseShift;
-        LocationInfo _locationInfo;
-        GameObjectModel _hitModel;
+        LocationInfo _locationInfo = new();
+        GameObjectModel _hitModel = new();
     }
 }

Source/Game/DataStorage/AreaTriggerDataStorage.cs

@@ -286,7 +286,7 @@ namespace Game.DataStorage
             uint oldMSTime = Time.GetMSTime();
             // Load area trigger positions (to put them on the server)
             //                                            0        1              2             3      4     5     6     7            8              9        10
-            SQLResult templates = DB.World.Query("SELECT SpawnId, AreaTriggerId, IsServerSide, MapId, PosX, PosY, PosZ, Orientation, PhaseUseFlags, PhaseId, PhaseGroup " +
+            SQLResult templates = DB.World.Query("SELECT SpawnId, AreaTriggerId, IsServerSide, MapId, PosX, PosY, PosZ, Orientation, PhaseUseFlags, PhaseId, PhaseGroup, " +
                 //11     12          13          14          15          16          17
                 "Shape, ShapeData0, ShapeData1, ShapeData2, ShapeData3, ShapeData4, ShapeData5 FROM `areatrigger`");
             if (!templates.IsEmpty())

Source/Game/Entities/AreaTrigger/AreaTriggerTemplate.cs

@@ -311,7 +311,7 @@ namespace Game.Entities
         public AreaTriggerScaleInfo OverrideScale = new();
         public AreaTriggerScaleInfo ExtraScale = new();
 
-        public AreaTriggerShapeInfo Shape;
+        public AreaTriggerShapeInfo Shape = new();
         public List<Vector2> PolygonVertices = new();
         public List<Vector2> PolygonVerticesTarget = new();
         public List<Vector3> SplinePoints = new();
@@ -327,7 +327,7 @@ namespace Game.Entities
         public uint PhaseGroup;
         public byte PhaseUseFlags;
 
-        public AreaTriggerShapeInfo Shape;
+        public AreaTriggerShapeInfo Shape = new();
     }
 
     public struct AreaTriggerAction

Source/Game/Spells/SpellInfo.cs

@@ -41,7 +41,8 @@ namespace Game.Spells
                 if (spellEffect == null)
                     continue;
 
-                _effects.Add(new SpellEffectInfo(this, spellEffect));
+                _effects.EnsureWritableListIndex(spellEffect.EffectIndex, new SpellEffectInfo(this));
+                _effects[(int)spellEffect.EffectIndex] = new SpellEffectInfo(this, spellEffect);
             }
 
             SpellName = spellName.Name;
@@ -252,7 +253,10 @@ namespace Game.Spells
             SpellName = spellName.Name;
 
             foreach (SpellEffectRecord spellEffect in effects)
-                _effects.Add(new SpellEffectInfo(this, spellEffect));
+            {
+                _effects.EnsureWritableListIndex(spellEffect.EffectIndex, new SpellEffectInfo(this));
+                _effects[(int)spellEffect.EffectIndex] = new SpellEffectInfo(this, spellEffect);
+            }
         }
 
         public bool HasEffect(SpellEffectName effect)
@@ -307,6 +311,9 @@ namespace Game.Spells
 
         public bool IsExplicitDiscovery()
         {
+            if (GetEffects().Count < 2)
+                return false;
+
             return ((GetEffect(0).Effect == SpellEffectName.CreateRandomItem
                 || GetEffect(0).Effect == SpellEffectName.CreateLoot)
                 && GetEffect(1).Effect == SpellEffectName.ScriptEffect)
@@ -3917,9 +3924,11 @@ namespace Game.Spells
 
     public class SpellEffectInfo
     {
-        public SpellEffectInfo(SpellInfo spellInfo, SpellEffectRecord effect)
+        public SpellEffectInfo(SpellInfo spellInfo, SpellEffectRecord effect = null)
         {
             _spellInfo = spellInfo;
+            if (effect != null)
+            {
                 EffectIndex = effect.EffectIndex;
                 Effect = (SpellEffectName)effect.Effect;
                 ApplyAuraName = (AuraType)effect.EffectAura;
@@ -3948,6 +3957,7 @@ namespace Game.Spells
                 Scaling.Variance = effect.Variance;
                 Scaling.ResourceCoefficient = effect.ResourceCoefficient;
                 EffectAttributes = effect.EffectAttributes;
+            }
 
             ImplicitTargetConditions = null;
 
@@ -4669,8 +4679,8 @@ namespace Game.Spells
         public int MiscValueB;
         public Mechanics Mechanic;
         public float PositionFacing;
-        public SpellImplicitTargetInfo TargetA;
-        public SpellImplicitTargetInfo TargetB;
+        public SpellImplicitTargetInfo TargetA = new();
+        public SpellImplicitTargetInfo TargetB = new();
         public SpellRadiusRecord RadiusEntry;
         public SpellRadiusRecord MaxRadiusEntry;
         public int ChainTargets;

Source/Game/Spells/SpellManager.cs

@@ -2462,7 +2462,7 @@ namespace Game.Entities
                         Log.outError(LogFilter.Sql, $"Serverside spell {spellId} difficulty {difficulty} has invalid max radius id {effect.EffectRadiusIndex[1]} at index {effect.EffectIndex}, set to 0");
                     }
 
-                    spellEffects[(spellId, difficulty)].Add(effect);
+                    spellEffects.Add((spellId, difficulty), effect);
 
                 } while (effectsResult.NextRow());
             }