diff --git a/src/GameLogic/CastleSiege/CastleSiegeHuntingPortalTalkPlugIn.cs b/src/GameLogic/CastleSiege/CastleSiegeHuntingPortalTalkPlugIn.cs
new file mode 100644
index 0000000..f736f80
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+++ b/src/GameLogic/CastleSiege/CastleSiegeHuntingPortalTalkPlugIn.cs
@@ -0,0 +1,59 @@
+// <copyright file="CastleSiegeHuntingPortalTalkPlugIn.cs" company="MUnique">
+// Licensed under the MIT License. See LICENSE file in the project root for full license information.
+// </copyright>
+
+namespace MUnique.OpenMU.GameLogic.CastleSiege;
+
+using System.Runtime.InteropServices;
+using MUnique.OpenMU.GameLogic.NPC;
+using MUnique.OpenMU.GameLogic.PlugIns;
+using MUnique.OpenMU.GameLogic.Views;
+using MUnique.OpenMU.Interfaces;
+using MUnique.OpenMU.PlugIns;
+
+/// <summary>
+/// ADAMU-CUSTOM (Castle Siege P4 — ownership reward): the castle Guard (NPC 220) on Valley of Loren is the
+/// portal into the castle-exclusive hunting ground (Land of Trials, map 31). It warps a player there only
+/// when their guild owns the castle (or they are a game master); otherwise it explains why they can't enter.
+/// </summary>
+[Guid("CA5710A0-7A1B-4C2D-8E3F-000000000220")]
+[PlugIn]
+[Display(Name = "Castle Siege Hunting Portal (Guard)", Description = "Guard NPC 220 on Valley of Loren warps the castle-owning guild into Land of Trials (map 31).")]
+public class CastleSiegeHuntingPortalTalkPlugIn : IPlayerTalkToNpcPlugIn
+{
+    private const short GuardNpcNumber = 220;
+    private const short ValleyOfLorenMapNumber = 30;
+
+    /// <inheritdoc />
+    public async ValueTask PlayerTalksToNpcAsync(Player player, NonPlayerCharacter npc, NpcTalkEventArgs eventArgs)
+    {
+        // Only the castle Guard on Valley of Loren acts as the hunting-ground portal.
+        if (npc.Definition.Number != GuardNpcNumber
+            || player.CurrentMap?.Definition.Number != ValleyOfLorenMapNumber)
+        {
+            return;
+        }
+
+        eventArgs.HasBeenHandled = true;
+
+        var (allowed, error) = await CastleSiegeMapAccess
+            .CanEnterMapAsync(player, CastleSiegeMapAccess.CastleHuntingMapNumber).ConfigureAwait(false);
+        if (!allowed)
+        {
+            await ShowAsync(player, error!).ConfigureAwait(false);
+            return;
+        }
+
+        var map = await player.GameContext.GetMapAsync((ushort)CastleSiegeMapAccess.CastleHuntingMapNumber).ConfigureAwait(false);
+        if (map?.SafeZoneSpawnGate is not { } gate)
+        {
+            await ShowAsync(player, "The castle hunting ground is not available right now.").ConfigureAwait(false);
+            return;
+        }
+
+        await player.WarpToAsync(gate).ConfigureAwait(false);
+    }
+
+    private static ValueTask ShowAsync(Player player, string text)
+        => player.InvokeViewPlugInAsync<IShowMessagePlugIn>(p => p.ShowMessageAsync(text, MessageType.BlueNormal));
+}