diff --git a/AssetStudio/BundleFile.cs b/AssetStudio/BundleFile.cs
index 86c306f..a59ee47 100644
--- a/AssetStudio/BundleFile.cs
+++ b/AssetStudio/BundleFile.cs
@@ -586,7 +586,7 @@ namespace AssetStudio
                                 {
                                     NetEaseUtils.DecryptWithHeader(compressedBytesSpan);
                                 }
-                                if (Game.Type.IsArknightsEndfield() && i == 0)
+                                if (Game.Type.IsArknightsEndfield() && i == 0 && compressedBytesSpan[..32].Count((byte)0xa6) > 5)
                                 {
                                     FairGuardUtils.Decrypt(compressedBytesSpan);
                                 }
@@ -622,7 +622,7 @@ namespace AssetStudio
                             try
                             {
                                 reader.Read(compressedBytesSpan);
-                                if (i == 0)
+                                if (i == 0 && compressedBytesSpan[..32].Count((byte)0xa6) > 5)
                                 {
                                     FairGuardUtils.Decrypt(compressedBytesSpan);
                                 }
diff --git a/AssetStudio/Crypto/FairGuardUtils.cs b/AssetStudio/Crypto/FairGuardUtils.cs
index 23a53a5..6e9e7f1 100644
--- a/AssetStudio/Crypto/FairGuardUtils.cs
+++ b/AssetStudio/Crypto/FairGuardUtils.cs
@@ -11,11 +11,11 @@ namespace AssetStudio
             Logger.Verbose($"Attempting to decrypt block with FairGuard encryption...");
 
             var encryptedOffset = 0;
-            var encryptedSize = bytes.Length > 0x500 ? 0x500 : bytes.Length;
+            var encryptedSize = Math.Min(0x500, bytes.Length);
 
             if (encryptedSize < 0x20)
             {
-                Logger.Verbose($"block size is less that minimum, skipping...");
+                Logger.Verbose("block size is less that minimum, skipping...");
                 return;
             }
 
@@ -27,11 +27,20 @@ namespace AssetStudio
                 encrypted[i] ^= 0xA6;
             }
 
+            // old
+            /*
             var seedPart0 = (uint)(encryptedInts[2] ^ 0x1274CBEC ^ encryptedInts[6] ^ 0x3F72EAF3);
             var seedPart1 = (uint)(encryptedInts[3] ^ 0xBE482704 ^ encryptedInts[0] ^ encryptedSize);
             var seedPart2 = (uint)(encryptedInts[1] ^ encryptedSize ^ encryptedInts[5] ^ 0x753BDCAA);
             var seedPart3 = (uint)(encryptedInts[0] ^ 0x82C57E3C ^ encryptedInts[7] ^ 0xE3D947D3);
             var seedPart4 = (uint)(encryptedInts[4] ^ 0x6F2A7347 ^ encryptedInts[7] ^ 0x4736C714);
+            */
+
+            var seedPart0 = (uint)(encryptedInts[2] ^ encryptedInts[6] ^ 0x226a61b9);
+            var seedPart1 = (uint)(encryptedInts[3] ^ encryptedInts[0] ^ 0x7a39d018 ^ encryptedSize);
+            var seedPart2 = (uint)(encryptedInts[1] ^ encryptedInts[5] ^ 0x18f6d8aa ^ encryptedSize);
+            var seedPart3 = (uint)(encryptedInts[0] ^ encryptedInts[7] ^ 0xaa255fb1);
+            var seedPart4 = (uint)(encryptedInts[4] ^ encryptedInts[7] ^ 0xf78dd8eb);
 
             var seedInts = new uint[] { seedPart0, seedPart1, seedPart2, seedPart3, seedPart4 };
             var seedBytes = MemoryMarshal.AsBytes<uint>(seedInts);
diff --git a/AssetStudio/LZ4/LZ4Inv.cs b/AssetStudio/LZ4/LZ4Inv.cs
index 042fea2..a7fe492 100644
--- a/AssetStudio/LZ4/LZ4Inv.cs
+++ b/AssetStudio/LZ4/LZ4Inv.cs
@@ -4,6 +4,16 @@ namespace AssetStudio;
 public class LZ4Inv : LZ4
 {
     public new static LZ4Inv Instance => new();
-    protected override (int encCount, int litCount) GetLiteralToken(ReadOnlySpan<byte> cmp, ref int cmpPos) => ((cmp[cmpPos] >> 4) & 0xf, (cmp[cmpPos++] >> 0) & 0xf);
+
+    protected override (int encCount, int litCount) GetLiteralToken(ReadOnlySpan<byte> cmp, ref int cmpPos)
+    {
+        var val = cmp[cmpPos++];
+        var lit = val & 0b00110011;
+        var enc = val & 0b11001100;
+        enc >>= 2;
+
+        return ((enc & 0b11) | enc >> 2, (lit & 0b11) | lit >> 2);
+    }
+
     protected override int GetChunkEnd(ReadOnlySpan<byte> cmp, ref int cmpPos) => cmp[cmpPos++] << 8 | cmp[cmpPos++] << 0;
 }
\ No newline at end of file