diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index 4d80207da0..91413cb203 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -5525,6 +5525,7 @@ public class Blocks{
             requirements(Category.units, with(Items.carbide, 300, Items.thorium, 500, Items.oxide, 200, Items.phaseFabric, 400));
             consumePower(4f);
             regionSuffix = "-dark";
+            researchCostMultiplier = 0.75f;
 
             size = 5;
         }};
diff --git a/core/src/mindustry/content/ErekirTechTree.java b/core/src/mindustry/content/ErekirTechTree.java
index ffcde5bf90..313db81748 100644
--- a/core/src/mindustry/content/ErekirTechTree.java
+++ b/core/src/mindustry/content/ErekirTechTree.java
@@ -58,6 +58,7 @@ public class ErekirTechTree{
         costMultipliers.put(Items.oxide, 0.5f);
         costMultipliers.put(Items.surgeAlloy, 0.7f);
         costMultipliers.put(Items.carbide, 0.3f);
+        costMultipliers.put(Items.carbide, 0.2f);
 
         for(var item : content.items()) costMultipliers.put(item, 0.9f);
 
diff --git a/core/src/mindustry/service/Achievement.java b/core/src/mindustry/service/Achievement.java
index 8c993ab409..d11587fd22 100644
--- a/core/src/mindustry/service/Achievement.java
+++ b/core/src/mindustry/service/Achievement.java
@@ -60,7 +60,7 @@ public enum Achievement{
     coolTurret,
     enablePixelation,
     openWiki,
-    useAccelerator,
+    //useAccelerator, //TODO remove from steam
     unlockAllZones,
 
     //TODO new ones
diff --git a/core/src/mindustry/service/GameService.java b/core/src/mindustry/service/GameService.java
index 6624f26d55..0942b8dbd1 100644
--- a/core/src/mindustry/service/GameService.java
+++ b/core/src/mindustry/service/GameService.java
@@ -342,8 +342,6 @@ public class GameService{
             }
         });
 
-        trigger(Trigger.acceleratorUse, useAccelerator);
-
         trigger(Trigger.impactPower, powerupImpactReactor);
 
         trigger(Trigger.flameAmmo, useFlameAmmo);
diff --git a/core/src/mindustry/world/blocks/campaign/Accelerator.java b/core/src/mindustry/world/blocks/campaign/Accelerator.java
index dc47e41a30..e1dde597c7 100644
--- a/core/src/mindustry/world/blocks/campaign/Accelerator.java
+++ b/core/src/mindustry/world/blocks/campaign/Accelerator.java
@@ -110,7 +110,7 @@ public class Accelerator extends Block{
 
             if(!state.isCampaign() || efficiency <= 0f) return;
 
-            ui.showInfo("This block doesn't work properly in the beta/alpha. It may be removed, or reworked. Check back in a later update.");
+            ui.showInfo("This block has been removed from the tech tree as of v7, and no longer has a use.\n\nWill it ever be used for anything? Who knows.");
 
             if(false)
             ui.planet.showPlanetLaunch(state.rules.sector, sector -> {