diff --git a/resource/infrast.json b/resource/infrast.json
index 2cbe8ebbfa..7fb9cc724c 100644
--- a/resource/infrast.json
+++ b/resource/infrast.json
@@ -145,6 +145,9 @@
                 "name": [
                     "潮汐守望"
                 ],
+                "efficient": {
+                    "all": -0.01
+                },
                 "template": "Bskill_ctrl_cost_aegir.png"
             },
             "bskill_ctrl_cost_bd1": {