diff --git a/Mage.Client/src/main/java/org/mage/plugins/card/dl/sources/ScryfallImageSupportTokens.java b/Mage.Client/src/main/java/org/mage/plugins/card/dl/sources/ScryfallImageSupportTokens.java
index 1f2c58b9dc4..8a28fe7808c 100644
--- a/Mage.Client/src/main/java/org/mage/plugins/card/dl/sources/ScryfallImageSupportTokens.java
+++ b/Mage.Client/src/main/java/org/mage/plugins/card/dl/sources/ScryfallImageSupportTokens.java
@@ -2546,6 +2546,7 @@ public class ScryfallImageSupportTokens {
 
             // DSK
             put("DSK/Beast", "https://api.scryfall.com/cards/tdsk/3?format=image");
+            put("DSK/Demon", "https://api.scryfall.com/cards/tdsk/9?format=image");
             put("DSK/Emblem Kaito", "https://api.scryfall.com/cards/tdsk/17/en?format=image");
             put("DSK/Everywhere", "https://api.scryfall.com/cards/tdsk/16?format=image");
             put("DSK/Glimmer", "https://api.scryfall.com/cards/tdsk/4?format=image");
diff --git a/Mage.Sets/src/mage/cards/u/UnholyAnnexRitualChamber.java b/Mage.Sets/src/mage/cards/u/UnholyAnnexRitualChamber.java
new file mode 100644
index 00000000000..04773cc23ab
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/u/UnholyAnnexRitualChamber.java
@@ -0,0 +1,92 @@
+package mage.cards.u;
+
+import mage.abilities.Ability;
+import mage.abilities.common.UnlockThisDoorTriggeredAbility;
+import mage.abilities.condition.common.PermanentsOnTheBattlefieldCondition;
+import mage.abilities.decorator.ConditionalOneShotEffect;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.CreateTokenEffect;
+import mage.abilities.effects.common.DrawCardSourceControllerEffect;
+import mage.abilities.effects.common.LoseLifeSourceControllerEffect;
+import mage.abilities.hint.ConditionHint;
+import mage.abilities.triggers.BeginningOfEndStepTriggeredAbility;
+import mage.cards.CardSetInfo;
+import mage.cards.RoomCard;
+import mage.constants.CardType;
+import mage.constants.Outcome;
+import mage.constants.SpellAbilityType;
+import mage.constants.SubType;
+import mage.filter.common.FilterControlledPermanent;
+import mage.game.Game;
+import mage.game.permanent.token.Demon66Token;
+import mage.players.Player;
+
+import java.util.UUID;
+
+/**
+ * @author PurpleCrowbar
+ */
+public final class UnholyAnnexRitualChamber extends RoomCard {
+
+    private static final FilterControlledPermanent filter = new FilterControlledPermanent("Demon");
+
+    static {
+        filter.add(SubType.DEMON.getPredicate());
+    }
+
+    public UnholyAnnexRitualChamber(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{2}{B}", "{3}{B}{B}", SpellAbilityType.SPLIT);
+        this.subtype.add(SubType.ROOM);
+
+        // Unholy Annex: At the beginning of your end step, draw a card. If you control a Demon, each opponent loses 2 life and you gain 2 life. Otherwise, you lose 2 life.
+        Ability left = new BeginningOfEndStepTriggeredAbility(new DrawCardSourceControllerEffect(1));
+        left.addEffect(new ConditionalOneShotEffect(
+                new UnholyAnnexDrainEffect(), new LoseLifeSourceControllerEffect(2),
+                new PermanentsOnTheBattlefieldCondition(filter), "If you control a Demon, each opponent loses 2 life and you gain 2 life. Otherwise, you lose 2 life"
+        ));
+        left.addHint(new ConditionHint(new PermanentsOnTheBattlefieldCondition(filter), "You control a Demon"));
+
+        // Ritual Chamber: When you unlock this door, create a 6/6 black Demon creature token with flying.
+        Ability right = new UnlockThisDoorTriggeredAbility(new CreateTokenEffect(new Demon66Token()), false, false);
+
+        this.addRoomAbilities(left, right);
+    }
+
+    private UnholyAnnexRitualChamber(final UnholyAnnexRitualChamber card) {
+        super(card);
+    }
+
+    @Override
+    public UnholyAnnexRitualChamber copy() {
+        return new UnholyAnnexRitualChamber(this);
+    }
+}
+
+class UnholyAnnexDrainEffect extends OneShotEffect {
+
+    UnholyAnnexDrainEffect() {
+        super(Outcome.GainLife);
+        this.staticText = "each opponent loses 2 life and you gain 2 life";
+    }
+
+    private UnholyAnnexDrainEffect(final UnholyAnnexDrainEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public UnholyAnnexDrainEffect copy() {
+        return new UnholyAnnexDrainEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        for (UUID opponentId : game.getOpponents(source.getControllerId())) {
+            Player player = game.getPlayer(opponentId);
+            if (player != null) {
+                player.loseLife(2, game, source, false);
+            }
+        }
+        game.getPlayer(source.getControllerId()).gainLife(2, game, source);
+        return true;
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/DuskmournHouseOfHorror.java b/Mage.Sets/src/mage/sets/DuskmournHouseOfHorror.java
index ce42e8e947c..869362df083 100644
--- a/Mage.Sets/src/mage/sets/DuskmournHouseOfHorror.java
+++ b/Mage.Sets/src/mage/sets/DuskmournHouseOfHorror.java
@@ -365,6 +365,8 @@ public final class DuskmournHouseOfHorror extends ExpansionSet {
         cards.add(new SetCardInfo("Undead Sprinter", 350, Rarity.RARE, mage.cards.u.UndeadSprinter.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Under the Skin", 203, Rarity.UNCOMMON, mage.cards.u.UnderTheSkin.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Under the Skin", 323, Rarity.UNCOMMON, mage.cards.u.UnderTheSkin.class, NON_FULL_USE_VARIOUS));
+        cards.add(new SetCardInfo("Unholy Annex // Ritual Chamber", 118, Rarity.RARE, mage.cards.u.UnholyAnnexRitualChamber.class, NON_FULL_USE_VARIOUS));
+        cards.add(new SetCardInfo("Unholy Annex // Ritual Chamber", 339, Rarity.RARE, mage.cards.u.UnholyAnnexRitualChamber.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Unidentified Hovership", 305, Rarity.RARE, mage.cards.u.UnidentifiedHovership.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Unidentified Hovership", 37, Rarity.RARE, mage.cards.u.UnidentifiedHovership.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Unnerving Grasp", 80, Rarity.UNCOMMON, mage.cards.u.UnnervingGrasp.class));
diff --git a/Mage/src/main/java/mage/game/permanent/token/Demon66Token.java b/Mage/src/main/java/mage/game/permanent/token/Demon66Token.java
new file mode 100644
index 00000000000..c292b5b538c
--- /dev/null
+++ b/Mage/src/main/java/mage/game/permanent/token/Demon66Token.java
@@ -0,0 +1,31 @@
+package mage.game.permanent.token;
+
+import mage.MageInt;
+import mage.abilities.keyword.FlyingAbility;
+import mage.constants.CardType;
+import mage.constants.SubType;
+
+/**
+ * @author PurpleCrowbar
+ */
+public final class Demon66Token extends TokenImpl {
+
+    public Demon66Token() {
+        super("Demon Token", "6/6 black Demon creature token with flying");
+        cardType.add(CardType.CREATURE);
+        color.setBlack(true);
+        subtype.add(SubType.DEMON);
+        power = new MageInt(6);
+        toughness = new MageInt(6);
+        addAbility(FlyingAbility.getInstance());
+    }
+
+    private Demon66Token(final Demon66Token token) {
+        super(token);
+    }
+
+    @Override
+    public Demon66Token copy() {
+        return new Demon66Token(this);
+    }
+}
diff --git a/Mage/src/main/resources/tokens-database.txt b/Mage/src/main/resources/tokens-database.txt
index 2587441c6b1..9e2a5a813ee 100644
--- a/Mage/src/main/resources/tokens-database.txt
+++ b/Mage/src/main/resources/tokens-database.txt
@@ -2782,6 +2782,7 @@
 
 # DSK
 |Generate|TOK:DSK|Beast|||BeastieToken|
+|Generate|TOK:DSK|Demon|||Demon66Token|
 |Generate|TOK:DSK|Everywhere|||EverywhereToken|
 |Generate|TOK:DSK|Glimmer|||GlimmerToken|
 |Generate|TOK:DSK|Gremlin|||Gremlin11Token|