diff --git a/02-arr/raid/t1.js b/02-arr/raid/t1.js
index 814e743cfb..84649e34f6 100644
--- a/02-arr/raid/t1.js
+++ b/02-arr/raid/t1.js
@@ -77,12 +77,9 @@ Options.Triggers.push({
     },
     {
       id: 'T1 Slime Timer First',
-      type: 'GameLog',
-      netRegex: {
-        line: 'The Allagan megastructure will be sealed off.*?',
-        code: Util.gameLogCodes.message,
-        capture: false,
-      },
+      type: 'SystemLogMessage',
+      // The Allagan megastructure will be sealed off
+      netRegex: { id: '7DC', param1: '379', capture: false },
       delaySeconds: 35,
       suppressSeconds: 5,
       infoText: (_data, _matches, output) => output.text(),
diff --git a/03-hw/alliance/weeping_city.js b/03-hw/alliance/weeping_city.js
index 804328b845..344ae2b2e6 100644
--- a/03-hw/alliance/weeping_city.js
+++ b/03-hw/alliance/weeping_city.js
@@ -70,22 +70,16 @@ Options.Triggers.push({
       // Because of this, we restrict those triggers for each boss to activate
       // only when that boss is in progress.
       id: 'Weeping City HeadMarker Arachne',
-      type: 'GameLog',
-      netRegex: {
-        line: 'The Queen\'s Room will be sealed off.*?',
-        code: Util.gameLogCodes.message,
-        capture: false,
-      },
+      type: 'SystemLogMessage',
+      // The Queen's Room will be sealed off
+      netRegex: { id: '7DC', param1: '6E0', capture: false },
       run: (data) => data.arachneStarted = true,
     },
     {
       id: 'Weeping City HeadMarker Ozma',
-      type: 'GameLog',
-      netRegex: {
-        line: 'The Gloriole will be sealed off.*?',
-        code: Util.gameLogCodes.message,
-        capture: false,
-      },
+      type: 'SystemLogMessage',
+      // The Gloriole will be sealed off
+      netRegex: { id: '7DC', param1: '6E5', capture: false },
       run: (data) => {
         data.arachneStarted = false;
         data.ozmaStarted = true;
@@ -93,12 +87,9 @@ Options.Triggers.push({
     },
     {
       id: 'Weeping City HeadMarker Calofisteri',
-      type: 'GameLog',
-      netRegex: {
-        line: 'The Tomb Of The Nullstone will be sealed off.*?',
-        code: Util.gameLogCodes.message,
-        capture: false,
-      },
+      type: 'SystemLogMessage',
+      // The Tomb Of The Nullstone will be sealed off
+      netRegex: { id: '7DC', param1: '6E6', capture: false },
       run: (data) => {
         data.ozmaStarted = false;
         data.calStarted = true;
diff --git a/04-sb/eureka/eureka_hydatos.js b/04-sb/eureka/eureka_hydatos.js
index 7d782371ef..8b1458ec77 100644
--- a/04-sb/eureka/eureka_hydatos.js
+++ b/04-sb/eureka/eureka_hydatos.js
@@ -75,22 +75,16 @@ Options.Triggers.push({
     },
     {
       id: 'BA Seal',
-      type: 'GameLog',
-      netRegex: {
-        line: '.* will be sealed off.*?',
-        code: Util.gameLogCodes.message,
-        capture: false,
-      },
+      type: 'SystemLogMessage',
+      // "will be sealed off"
+      netRegex: { id: '7DC', capture: false },
       run: (data) => data.sealed = true,
     },
     {
       id: 'BA Clear Data',
-      type: 'GameLog',
-      netRegex: {
-        line: '.*is no longer sealed.*?',
-        code: Util.gameLogCodes.message,
-        capture: false,
-      },
+      type: 'SystemLogMessage',
+      // "is no longer sealed"
+      netRegex: { id: '7DE', capture: false },
       run: (data) => {
         delete data.side;
         delete data.mythcall;
diff --git a/06-ew/dungeon/the_sildihn_subterrane.js b/06-ew/dungeon/the_sildihn_subterrane.js
index 44954b2034..33dfb3f1f0 100644
--- a/06-ew/dungeon/the_sildihn_subterrane.js
+++ b/06-ew/dungeon/the_sildihn_subterrane.js
@@ -92,12 +92,9 @@ Options.Triggers.push({
   triggers: [
     {
       id: 'Sildihn Geryon Seal Left Mechs',
-      type: 'GameLog',
-      netRegex: {
-        line: 'The Silt Pump will be sealed off.*?',
-        code: Util.gameLogCodes.message,
-        capture: false,
-      },
+      type: 'SystemLogMessage',
+      // The Silt Pump will be sealed off
+      netRegex: { id: '7DC', param1: '1068', capture: false },
       // May be overwritten by Runaway Sludge below.
       run: (data) => data.catapultMechs = leftDoorYesPump,
     },
@@ -124,12 +121,9 @@ Options.Triggers.push({
     },
     {
       id: 'Sildihn Geryon Seal Right Mechs',
-      type: 'GameLog',
-      netRegex: {
-        line: 'The Settling Basin will be sealed off.*?',
-        code: Util.gameLogCodes.message,
-        capture: false,
-      },
+      type: 'SystemLogMessage',
+      // The Settling Basin will be sealed off
+      netRegex: { id: '7DC', param1: '106D', capture: false },
       // May be overwritten by Suddenly Sewage below.
       run: (data) => data.catapultMechs = rightDoorNoCeruleum,
     },