serialize some fields

Assets/_Project/Definitions/BuilderSpells/FireballSpell.asset

@@ -12,13 +12,13 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 22b36bfcd0ae4af4098d908138e874e1, type: 3}
   m_Name: FireballSpell
   m_EditorClassIdentifier: Assembly-CSharp::TD.Gameplay.BuilderSpells.FireballSpellDefinition
-  DisplayName: 
-  Description: 
+  DisplayName: Fireball
+  Description: Shoot a fireball
   Icon: {fileID: 0}
   Cooldown: 5
   TargetType: 0
   Radius: 3
   enemyLayerMask:
     serializedVersion: 2
-    m_Bits: 128
+    m_Bits: 1024
   Damage: 50

Assets/_Project/Definitions/BuilderSpells/SlowAreaSpell.asset

@@ -20,6 +20,6 @@ MonoBehaviour:
   Radius: 5
   enemyLayerMask:
     serializedVersion: 2
-    m_Bits: 128
+    m_Bits: 1024
   SlowFactor: 0.5
   EffectDuration: 3

Assets/_Project/Scripts/Gameplay/BuilderSpells/FireballSpellDefinition.cs

@@ -10,7 +10,7 @@ namespace TD.Gameplay.BuilderSpells
     /// </summary>
     /// <remarks>
     /// <see cref="BuilderSpellDefinition.TargetType"/> is <see cref="SpellTargetType.PointTarget"/>
-    /// — the cast controller shows only a fixed-size reticle, even though
+    /// — the cast controller shows only a fixed-size reticule, even though
     /// <see cref="BuilderSpellDefinition.Radius"/> is still used internally here as the splash
     /// radius (0 = no splash, direct hit only).
     /// </remarks>
@@ -19,6 +19,14 @@ namespace TD.Gameplay.BuilderSpells
     {
         public override BuilderSpellKind Kind => BuilderSpellKind.Fireball;
 
+        [Header("Impact VFX")]
+        [Tooltip("Prefab spawned at the target point on a successful cast. Optional — leave empty for no visual.")]
+        [SerializeField] private GameObject impactVfxPrefab;
+
+        [Tooltip("Seconds before the spawned VFX instance is destroyed.")]
+        [Min(0f)]
+        [SerializeField] private float impactVfxLifetime = 2f;
+        
         [Header("Fireball")]
         [Tooltip("Damage dealt to every enemy within Radius of the target point.")]
         [Min(0f)]
@@ -43,5 +51,11 @@ namespace TD.Gameplay.BuilderSpells
 
             return hitAny;
         }
+
+        public override void ClientPlayVfx(Vector3 targetPoint)
+        {
+            if (impactVfxPrefab != null)
+                Destroy(Instantiate(impactVfxPrefab, targetPoint, Quaternion.identity), impactVfxLifetime);
+        }
     }
 }