diff --git a/SVSim.Database/Repositories/Card/CardInventoryRepository.cs b/SVSim.Database/Repositories/Card/CardInventoryRepository.cs
index 6c1cc53..da4ff41 100644
--- a/SVSim.Database/Repositories/Card/CardInventoryRepository.cs
+++ b/SVSim.Database/Repositories/Card/CardInventoryRepository.cs
@@ -136,7 +136,7 @@ public class CardInventoryRepository : ICardInventoryRepository
 
         // Mutation phase via InventoryService transaction — freeplay-aware RedEther debit,
         // card grants with cosmetic cascade.
-        await using var tx = await _inv.BeginAsync(viewerId);
+        await using var tx = await _inv.BeginAsync(viewerId, configure: cfg => cfg.Source = GrantSource.CardCraft);
 
         var spendResult = await tx.TrySpendAsync(SpendCurrency.RedEther, (long)totalCost);
         if (!spendResult.Success)
diff --git a/SVSim.Database/Services/Inventory/GrantSource.cs b/SVSim.Database/Services/Inventory/GrantSource.cs
index d721ef2..abb0c6a 100644
--- a/SVSim.Database/Services/Inventory/GrantSource.cs
+++ b/SVSim.Database/Services/Inventory/GrantSource.cs
@@ -28,7 +28,8 @@ public enum GrantSource
     AchievementReward = 13,
     SerialCodeRedeem = 14,
     CardCosmeticCascade = 15,
-    // Reserved high to stay visually distinct from gameplay sources; 16–98 are intentionally unused.
+    CardCraft           = 16,
+    // Reserved high to stay visually distinct from gameplay sources; 17–98 are intentionally unused.
     AdminGrant = 99,
 }
 
@@ -57,6 +58,7 @@ public static class GrantSourceMessages
         GrantSource.AchievementReward   => "From achievement reward",
         GrantSource.SerialCodeRedeem    => "From serial code",
         GrantSource.CardCosmeticCascade => "Card cosmetic",
+        GrantSource.CardCraft           => "From card crafting",
         GrantSource.AdminGrant          => "From admin grant",
         _ => throw new ArgumentOutOfRangeException(nameof(source), source, "Unhandled GrantSource"),
     };