DiD S3: add another easter egg

data/campaigns/Descent_Into_Darkness/scenarios/03_A_Haunting_in_Winter.cfg

@@ -1024,8 +1024,6 @@
             variable=s_unit
         [/unstore_unit]
 
-        {CLEAR_VARIABLE s_unit}
-
         [if]
             [variable]
                 name=unit.type
@@ -1040,8 +1038,35 @@
                 [fire_event]
                     name=rat hint
                 [/fire_event]
+
+                # I swear if you just sit here eating rats all day...
+                [if]
+                    [variable]
+                        name=s_unit.type
+                        equals=Necrophage
+                    [/variable]
+                    [or]
+                        [variable]
+                            name=s_unit.type
+                            equals=Ghast
+                        [/variable]
+                    [/or]
+                    [and]
+                        [variable]
+                            name=s_unit.max_hitpoints
+                            greater_than=111
+                        [/variable]
+                    [/and]
+                    [then]
+                        [fire_event]
+                            name=rat eating
+                        [/fire_event]
+                    [/then]
+                [/if]
             [/else]
         [/if]
+
+        {CLEAR_VARIABLE s_unit}
     [/event]
     [event]
         name=crawler hint
@@ -1059,6 +1084,14 @@
             message= _ "I don’t think there’s much experience to be gained by fighting a few rats."
         [/message]
     [/event]
+    [event]
+        name=rat eating
+
+        [message]
+            speaker=Malin Keshar
+            message= _ "I must be absolutely mad to be spending hours here just feeding rats to this rotten pile of flesh..."
+        [/message]
+    [/event]
     # spawn crawlers
     [event]
         name=new turn