diff --git a/data/sql/updates/pending_db_world/rev_1605979091794346800.sql b/data/sql/updates/pending_db_world/rev_1605979091794346800.sql
new file mode 100644
index 000000000..1e54c3f18
--- /dev/null
+++ b/data/sql/updates/pending_db_world/rev_1605979091794346800.sql
@@ -0,0 +1,32 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1605979091794346800');
+
+/* Add extra mobs to The Antechamber in 25-man version of Ulduar */
+
+DELETE FROM `creature` WHERE `guid` IN (136770,136771,136772,136773,136774,136775);
+INSERT INTO `creature` VALUES 
+
+/* Near Teleporter */
+
+    /* Iron Golem */
+    (136770, 34190, 603, 0, 0, 2, 1, 26155, 0, 1548.84, -10.5333, 420.967, 5.04629, 604800, 0, 0, 404430, 0, 0, 0, 0, 0, '', 0),
+    /* Lightning Charged Iron Dwarf */
+    (136771, 34199, 603, 0, 0, 2, 1, 26239, 1, 1549.15, -19.0012, 420.967, 5.12484, 604800, 5, 0, 471835, 0, 1, 0, 0, 0, '', 0),
+    /* Iron Mender */
+    (136772, 34198, 603, 0, 0, 2, 1, 26218, 1, 1552.57, -14.2679, 420.967, 3.94674, 604800, 0, 0, 337025, 62535, 0, 0, 0, 0, '', 0),
+
+/* Near Stairs */
+
+    /* Iron Golem */
+    (136773, 34190, 603, 0, 0, 2, 1, 26155, 0, 1682.97, -11.0873, 427.312, 3.93888, 604800, 0, 0, 404430, 0, 0, 0, 0, 0, '', 0),
+    /* Lightning Charged Iron Dwarf */
+    (136774, 34199, 603, 0, 0, 2, 1, 26239, 1, 1679.91, -19.6422, 427.31, 3.19275, 604800, 0, 0, 471835, 0, 0, 0, 0, 0, '', 0),
+    /* Iron Mender */
+    (136775, 34198, 603, 0, 0, 2, 1, 26218, 1, 1676.98, -11.2869, 427.31, 5.76657, 604800, 0, 0, 337025, 62535, 0, 0, 0, 0, '', 0);
+    
+/* Lightning Charged Iron Dwarf unsheath weapons and emote ready */
+DELETE FROM `creature_addon` WHERE `guid` IN (136609,136610,136771,136774);
+INSERT INTO `creature_addon` (`guid`, `bytes2`, `emote`) VALUES 
+(136609, 1, 333),
+(136610, 1, 0),
+(136771, 1, 0),
+(136774, 1, 333);