diff --git a/Mage.Client/src/main/java/org/mage/plugins/card/dl/sources/ScryfallImageSupportCards.java b/Mage.Client/src/main/java/org/mage/plugins/card/dl/sources/ScryfallImageSupportCards.java
index efb2f75a0f3..e85f9c4c437 100644
--- a/Mage.Client/src/main/java/org/mage/plugins/card/dl/sources/ScryfallImageSupportCards.java
+++ b/Mage.Client/src/main/java/org/mage/plugins/card/dl/sources/ScryfallImageSupportCards.java
@@ -534,6 +534,7 @@ public class ScryfallImageSupportCards {
             add("30A"); // Thirtieth Anniversary Edition
             add("LTR"); // The Lord of the Rings: Tales of Middle-Earth
             add("LTC"); // Tales of Middle-Earth Commander
+            add("CMM"); // Commander Masters
         }
     };
 
diff --git a/Mage.Sets/src/mage/sets/CommanderMasters.java b/Mage.Sets/src/mage/sets/CommanderMasters.java
new file mode 100644
index 00000000000..7491d9079e8
--- /dev/null
+++ b/Mage.Sets/src/mage/sets/CommanderMasters.java
@@ -0,0 +1,27 @@
+package mage.sets;
+
+import mage.cards.ExpansionSet;
+import mage.constants.Rarity;
+import mage.constants.SetType;
+
+public final class CommanderMasters extends ExpansionSet {
+
+    private static final CommanderMasters instance = new CommanderMasters();
+
+    public static CommanderMasters getInstance() {
+        return instance;
+    }
+
+    private CommanderMasters() {
+        super("Commander Masters", "CMM", ExpansionSet.buildDate(2023, 8, 4), SetType.SUPPLEMENTAL);
+        this.blockName = "Commander Masters";
+        this.hasBasicLands = false;
+        this.hasBoosters = false; //temporary
+
+        cards.add(new SetCardInfo("Capture of Jingzhou", 79, Rarity.RARE, mage.cards.c.CaptureOfJingzhou.class));
+        cards.add(new SetCardInfo("Jeweled Lotus", 396, Rarity.MYTHIC, mage.cards.j.JeweledLotus.class));
+        cards.add(new SetCardInfo("Personal Tutor", 110, Rarity.RARE, mage.cards.p.PersonalTutor.class));
+        cards.add(new SetCardInfo("Selvala, Heart of the Wilds", 220, Rarity.MYTHIC, mage.cards.s.SelvalaHeartOfTheWilds.class));
+        cards.add(new SetCardInfo("The Ur-Dragon", 361, Rarity.MYTHIC, mage.cards.t.TheUrDragon.class));
+    }
+}
\ No newline at end of file
diff --git a/Utils/known-sets.txt b/Utils/known-sets.txt
index a64e297a25d..12c4794dd87 100644
--- a/Utils/known-sets.txt
+++ b/Utils/known-sets.txt
@@ -37,6 +37,7 @@ Commander Legends: Battle for Baldur's Gate|CommanderLegendsBattleForBaldursGate
 Commander Anthology|CommanderAnthology|
 Commander Anthology 2018|CommanderAnthology2018|
 Commander's Arsenal|CommandersArsenal|
+Commander Masters|CommanderMasters|
 Conflux|Conflux|
 Conspiracy: Take the Crown|ConspiracyTakeTheCrown|
 Core Set 2019|CoreSet2019|
diff --git a/Utils/mtg-cards-data.txt b/Utils/mtg-cards-data.txt
index 4b2541acbdf..d59442db78b 100644
--- a/Utils/mtg-cards-data.txt
+++ b/Utils/mtg-cards-data.txt
@@ -48843,3 +48843,12 @@ Sol Ring|Tales of Middle-earth Commander|284|U|{1}|Artifact|||{T}: Add {C}{C}.|
 The Great Henge|Tales of Middle-earth Commander|348|M|{7}{G}{G}|Legendary Artifact|||This spell costs {X} less to cast, where X is the greatest power among creatures you control.${T}: Add {G}{G}. You gain 2 life.$Whenever a nontoken creature enters the battlefield under your control, put a +1/+1 counter on it and draw a card.|
 Ensnaring Bridge|Tales of Middle-earth Commander|350|M|{3}|Artifact|||Creatures with power greater than the number of cards in your hand can't attack.|
 Wasteland|Tales of Middle-earth Commander|376|M||Land|||{T}: Add {C}.${T}, Sacrifice Wasteland: Destroy target nonbasic land.|
+Capture of Jingzhou|Commander Masters|79|R|{3}{U}{U}|Sorcery|||Take an extra turn after this one.|
+Personal Tutor|Commander Masters|110|R|{U}|Sorcery|||Search your library for a sorcery card, reveal it, then shuffle and put that card on top.|
+Selvala, Heart of the Wilds|Commander Masters|220|M|{1}{G}{G}|Legendary Creature - Elf Scout|2|3|Whenever another creature enters the battlefield, its controller may draw a card if its power is greater than each other creature's power.${G}, {T}: Add X mana in any combination of colors, where X is the greatest power among creatures you control.|
+The Ur-Dragon|Commander Masters|361|M|{4}{W}{U}{B}{R}{G}|Legendary Creature - Dragon Avatar|10|10|Eminence -- As long as The Ur-Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost {1} less to cast.$Flying$Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.|
+Jeweled Lotus|Commander Masters|396|M|{0}|Artifact|||{T}, Sacrifice Jeweled Lotus: Add three mana of any one color. Spend this mana only to cast your commander.|
+Zhulodok, Void Gorger|Commander Masters|704|M|{5}{C}|Legendary Creature - Eldrazi|7|4|Colorless spells you cast from your hand with mana value 7 or greater have "Cascade, cascade."|
+Anikthea, Hand of Erebos|Commander Masters|705|M|{2}{W}{B}{G}|Legendary Enchantment Creature - Demigod|4|4|Menace$Other enchantment creatures you control have menace.$Whenever Anikthea enters the battlefield or attacks, exile up to one target non-Aura enchantment card from your graveyard. Create a token that's a copy of that card, except it's a 3/3 black Zombie creature in addition to its other types.|
+Commodore Guff|Commander Masters|706|M|{1}{U}{R}{W}|Legendary Planeswalker - Guff|6|At the beginning of your end step, put a loyalty counter on another target planeswalker you control.$+1: Create a 1/1 red Wizard creature token with "{T}: Add {R}. Spend this mana only to cast a planeswalker spell."$-3: You draw X cards and Commodore Guff deals X damage to each opponent, where X is the number of planeswalkers you control.$Commodore Guff can be your commander.|
+Sliver Gravemother|Commander Masters|707|M|{W}{U}{B}{R}{G}|Legendary Creature - Sliver|6|6|The "legend rule" doesn't apply to Slivers you control.$Each Sliver creature card in your graveyard has encore {X}, where X is its mana value.$Encore {5}|
diff --git a/Utils/mtg-sets-data.txt b/Utils/mtg-sets-data.txt
index 58d89cbf20a..305e26c8abb 100644
--- a/Utils/mtg-sets-data.txt
+++ b/Utils/mtg-sets-data.txt
@@ -47,6 +47,7 @@ Clash Pack|CLASH|
 Commander Anthology|CMA|
 Commander Anthology 2018|CM2|
 Commander's Arsenal|CM1|
+Commander Masters|CMM|
 Commander|CMD|
 Conspiracy|CNS|
 Conspiracy: Take the Crown|CN2|