diff --git a/data/campaigns/Descent_Into_Darkness/scenarios/11_Descent_into_Darkness.cfg b/data/campaigns/Descent_Into_Darkness/scenarios/11_Descent_into_Darkness.cfg
index 197155e1930d..0588b60622a8 100644
--- a/data/campaigns/Descent_Into_Darkness/scenarios/11_Descent_into_Darkness.cfg
+++ b/data/campaigns/Descent_Into_Darkness/scenarios/11_Descent_into_Darkness.cfg
@@ -520,8 +520,65 @@
         [/remove_item]
 
         # Previously recruited and new adepts can now also become liches
-        {MODIFY_UNIT (type=Dark Adept DiD)    advances_to (Dark Sorcerer)}
-        {MODIFY_UNIT (type=Dark Sorcerer DiD) advances_to (Lich,Necromancer)}
+        # To tranform them, all units from the recall list get copied
+        # and replaced by a new one with the changed type
+        [store_unit]
+            [filter]
+                type=Dark Adept DiD, Dark Sorcerer DiD
+            [/filter]
+            variable=mages
+            kill=yes
+        [/store_unit]
+
+        [for]
+            array=mages
+            variable=i
+            [do]
+                # Get the new type:
+                [switch]
+                    variable=mages[$i].type
+                    [case]
+                        value=Dark Adept DiD
+                        [set_variable]
+                            name=new_type
+                            value=Dark Adept
+                        [/set_variable]
+                    [/case]
+                    [case]
+                        value=Dark Sorcerer DiD
+                        [set_variable]
+                            name=new_type
+                            value=Dark Sorcerer
+                        [/set_variable]
+                    [/case]
+                [/switch]
+
+                # Create a new mage with the same attributes as the old one:
+                [unit]
+                    type=$new_type
+                    max_experience=$mages[$i].max_experience
+                    max_hitpoints=$mages[$i].max_hitpoints
+                    experience=$mages[$i].experience
+                    name=$mages[$i].name
+                    id=$mages[$i].id
+                    gender=$mages[$i].gender
+                    side=1
+                    placement=recall  # The only place they can be at the moment.
+                    [modifications]
+                        [insert_tag]
+                            name=trait
+                            variable=mages[$i].modifications.trait[0]
+                        [/insert_tag]
+                        [insert_tag]
+                            name=trait
+                            variable=mages[$i].modifications.trait[1]
+                        [/insert_tag]
+                    [/modifications]
+                [/unit]
+            [/do]
+        [/for]
+
+        {CLEAR_VARIABLE mages,new_type}
 
         [disallow_recruit]
             side=1