diff --git a/Common/Rewards/CardTransformReward.cs b/Common/Rewards/CardTransformReward.cs
new file mode 100644
index 00000000..15bdf1f5
--- /dev/null
+++ b/Common/Rewards/CardTransformReward.cs
@@ -0,0 +1,106 @@
+using BaseLib.Abstracts;
+using BaseLib.Extensions;
+using BaseLib.Patches.Content;
+using MegaCrit.Sts2.Core.Entities.Players;
+using MegaCrit.Sts2.Core.Localization;
+using MegaCrit.Sts2.Core.Models.Cards;
+using MegaCrit.Sts2.Core.Rewards;
+using MegaCrit.Sts2.Core.Runs;
+using MegaCrit.Sts2.Core.Saves.Runs;
+
+namespace BaseLib.Common.Rewards;
+
+/// <summary>
+/// A reward class similar to the card removal one created by <see cref="ForbiddenGrimoire"/>,
+/// only for transforming instead of removing cards
+/// </summary>
+/// <example>
+/// In a relic or power's <c>AfterCombatEnd</c> override
+/// <code>
+/// room.AddExtraReward(Owner.Player, new CardTransformReward(Owner.Player) {Amount = Amount, Upgrade = true});
+/// </code> </example>
+public sealed class CardTransformReward(Player player) : CustomReward(player)
+{
+    /// <summary>
+    /// A new <see cref="RewardType"/> defined with the <see cref="CustomEnumAttribute"/> attribute
+    /// </summary>
+    [CustomEnum] public static RewardType CardTransform;
+    /// <summary>
+    /// Reference to the <see cref="RewardType"/> <see cref="CardTransform"/> defined earlier
+    /// </summary>
+    protected override RewardType RewardType => CardTransform;
+
+    /// <summary>
+    /// Whether the card rewards should be upgraded or not
+    /// </summary>
+    public required bool Upgrade;
+    /// <summary>
+    /// How many cards can be selected in this reward screen
+    /// </summary>
+    public required int Amount;
+
+    /// <summary>
+    /// The description to show in the reward screen,
+    /// switches based on whether the reward will upgrade the transformed cards
+    /// </summary>
+    public override LocString Description
+    {
+        get
+        {
+            LocString locString = new LocString("gameplay_ui", "COMBAT_REWARD_CARD_TRANSFORM");
+            locString.Add("cards", Amount);
+            locString.Add("Upgrade", Upgrade);
+            return locString;
+        }
+    }
+    /// <inheritdoc/>
+    public override bool IsPopulated => true;
+    public static string RewardIcon => ImageHelperExtensions.GetModImagePath("ui/reward_screen/reward_icon_card_transform.png");
+    /// <inheritdoc/>
+    protected override string IconPath => RewardIcon;
+
+
+    /// <summary>
+    /// Serializing the reward, saving whether to upgrade and how many cards to transform in the vanilla fields
+    /// </summary>
+    public override SerializableReward ToSerializable()
+    {
+        return new SerializableReward()
+        {
+            RewardType = CardTransform,
+            GoldAmount = Amount,
+            WasGoldStolenBack = Upgrade
+        };
+    }
+
+    /// <summary>
+    /// Recreates the reward from the saved <see cref="SerializableReward"/>
+    /// </summary>
+    /// <param name="save">The <see cref="SerializableReward"/> that was created and saved from
+    /// <see cref="ToSerializable"/></param>
+    /// <param name="player">The <see cref="Player"/> the reward belongs to</param>
+    public CardTransformReward CreateFromSerializable(SerializableReward save, Player player)
+    {
+        return new CardTransformReward(player) {
+            // hijacking the gold amounts as a temp hack before worrying about extending the serialized values
+            Amount = save.GoldAmount,
+            Upgrade = save.WasGoldStolenBack
+        };
+    }
+
+    /// <inheritdoc/>
+    public override SerializableCustomReward<CustomReward> SerializeMethod => CreateFromSerializable;
+
+    /// <inheritdoc/>
+    public override void MarkContentAsSeen() { }
+
+    /// <inheritdoc />
+    public override Task Populate() { return Task.CompletedTask; }
+
+    /// <inheritdoc/>
+    protected override async Task<bool> OnSelect()
+    {
+        BaseLibMain.Logger.Info("Obtained card transformation from reward");
+        return await RunManager.Instance.RewardSynchronizer.DoLocalCardTransform(Amount, true);
+    }
+}
diff --git a/Common/Rewards/CardTransformRewardMessage.cs b/Common/Rewards/CardTransformRewardMessage.cs
new file mode 100644
index 00000000..955e0487
--- /dev/null
+++ b/Common/Rewards/CardTransformRewardMessage.cs
@@ -0,0 +1,78 @@
+using BaseLib.Abstracts;
+using BaseLib.Patches.Content;
+using MegaCrit.Sts2.Core.Combat;
+using MegaCrit.Sts2.Core.Entities.Players;
+using MegaCrit.Sts2.Core.Helpers;
+using MegaCrit.Sts2.Core.Logging;
+using MegaCrit.Sts2.Core.Multiplayer.Game;
+using MegaCrit.Sts2.Core.Multiplayer.Serialization;
+using MegaCrit.Sts2.Core.Runs;
+
+namespace BaseLib.Common.Rewards;
+
+/// <summary>
+/// Message for transforming a card from a new reward type
+/// </summary>
+public sealed class ZZ_CardTransformRewardMessage : CustomRewardMessage
+{
+    internal void HandleCardTransformedMessage(ZZ_CardTransformRewardMessage message, ulong senderId)
+    {
+        BaseLibMain.Logger.Debug($"Handling message {message}");
+        var rs = RunManager.Instance.RewardSynchronizer;
+        if (CombatManager.Instance.IsInProgress)
+        {
+            rs.BufferCustomRewardMessage(message, senderId);
+            BaseLibMain.Logger.Debug($"Buffered card transform message for {rs.PlayerCollection()?.GetPlayer(senderId)}");
+            return;
+        }
+
+        Player? player = rs.PlayerCollection()?.GetPlayer(senderId);
+        if (player == rs.LocalPlayerRef())
+        {
+            throw new InvalidOperationException("CardTransformRewardMessage should not be sent to the player transforming the card");
+        }
+        TaskHelper.RunSafely(rs.DoCardTransform(player, message.Amount, message.Upgrade));
+    }
+
+    /// <inheritdoc/>
+    public override void Dispose(RunLocationTargetedMessageBuffer messageBuffer)
+    {
+        BaseLibMain.Logger.Debug($"Unregistering handler for {GetType()}");
+        messageBuffer.UnregisterMessageHandler<ZZ_CardTransformRewardMessage>(HandleCardTransformedMessage);
+    }
+
+    /// <inheritdoc/>
+    public override void Initialize(RunLocationTargetedMessageBuffer messageBuffer)
+    {
+        BaseLibMain.Logger.Debug($"Registering handler for {GetType()}");
+        messageBuffer.RegisterMessageHandler<ZZ_CardTransformRewardMessage>(HandleCardTransformedMessage);
+    }
+
+    /// <summary>
+    /// Whether to upgrade the card as well as transforming
+    /// </summary>
+    public required bool Upgrade;
+    /// <summary>
+    /// The amount of cards to select from
+    /// </summary>
+    public required int Amount;
+
+    /// <inheritdoc/>
+    public override LogLevel LogLevel => LogLevel.Debug;
+
+    /// <inheritdoc/>
+    public override void Deserialize(PacketReader reader)
+    {
+        Location = reader.Read<RunLocation>();
+        Amount = reader.ReadInt();
+        Upgrade = reader.ReadBool();
+    }
+
+    /// <inheritdoc/>
+    public override void Serialize(PacketWriter writer)
+    {
+        writer.Write(Location);
+        writer.WriteInt(Amount);
+        writer.WriteBool(Upgrade);
+    }
+}