diff --git a/data/mods/MindOverMatter/effects/effects_monster.json b/data/mods/MindOverMatter/effects/effects_monster.json
index 7f02a47079bae..1b1134f7ae029 100644
--- a/data/mods/MindOverMatter/effects/effects_monster.json
+++ b/data/mods/MindOverMatter/effects/effects_monster.json
@@ -151,6 +151,16 @@
     "enchantments": [ "enchant_riftwalker_teleport" ],
     "immune_flags": [ "TELESTOP", "DIMENSIONAL_ANCHOR" ]
   },
+  {
+    "type": "effect_type",
+    "id": "effect_teleporting_lock",
+    "name": [ "Caught in the Angles" ],
+    "desc": [ "You feel a strange, inward force." ],
+    "apply_message": "You feel a strange, inward force.",
+    "remove_message": "The strange, inward force suddenly vanishes.",
+    "rating": "bad",
+    "flags": [ "TELEPORT_LOCK" ]
+  },
   {
     "type": "effect_type",
     "id": "effect_vitakinetic_health_down",
diff --git a/data/mods/MindOverMatter/monsters/monster_overrides.json b/data/mods/MindOverMatter/monsters/monster_overrides.json
index 6410042d96357..b35f3ab76e8bc 100644
--- a/data/mods/MindOverMatter/monsters/monster_overrides.json
+++ b/data/mods/MindOverMatter/monsters/monster_overrides.json
@@ -221,14 +221,16 @@
     "id": "mon_hound_tindalos",
     "copy-from": "mon_hound_tindalos",
     "type": "MONSTER",
-    "extend": { "flags": [ "TEEP_IMMUNE" ] },
+    "extend": { "flags": [ "TEEP_IMMUNE", "TELEPORT_IMMUNE" ] },
+    "attack_effs": [ { "id": "effect_teleporting_lock", "duration": [ 5, 60 ], "chance": 50 } ],
     "armor": { "cut": 50, "bullet": 40, "electric": 1, "psi_telekinetic_damage": 50 }
   },
   {
     "id": "mon_hound_tindalos_afterimage",
     "copy-from": "mon_hound_tindalos_afterimage",
     "type": "MONSTER",
-    "extend": { "flags": [ "TEEP_IMMUNE" ] },
+    "extend": { "flags": [ "TEEP_IMMUNE", "TELEPORT_IMMUNE" ] },
+    "attack_effs": [ { "id": "effect_teleporting_lock", "duration": [ 5, 60 ], "chance": 50 } ],
     "armor": { "cut": 50, "bullet": 40, "electric": 1, "psi_telekinetic_damage": 50 }
   },
   {