diff --git a/core/assets/maps/atolls.msav b/core/assets/maps/atolls.msav
index 7fb5a58537..42a70ab90c 100644
Binary files a/core/assets/maps/atolls.msav and b/core/assets/maps/atolls.msav differ
diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index 300ab3f2c4..66947331b2 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -2871,7 +2871,7 @@ public class Blocks{
         //region storage
 
         coreShard = new CoreBlock("core-shard"){{
-            requirements(Category.effect, BuildVisibility.editorOnly, with(Items.copper, 1000, Items.lead, 800));
+            requirements(Category.effect, BuildVisibility.coreZoneOnly, with(Items.copper, 1000, Items.lead, 800));
             alwaysUnlocked = true;
 
             isFirstTier = true;
@@ -2879,6 +2879,7 @@ public class Blocks{
             health = 1100;
             itemCapacity = 4000;
             size = 3;
+            buildCostMultiplier = 2f;
 
             unitCapModifier = 8;
         }};
diff --git a/core/src/mindustry/world/meta/BuildVisibility.java b/core/src/mindustry/world/meta/BuildVisibility.java
index d37f1d0012..5572b3cdf2 100644
--- a/core/src/mindustry/world/meta/BuildVisibility.java
+++ b/core/src/mindustry/world/meta/BuildVisibility.java
@@ -2,6 +2,7 @@ package mindustry.world.meta;
 
 import arc.func.*;
 import mindustry.*;
+import mindustry.content.*;
 
 public class BuildVisibility{
     public static final BuildVisibility
@@ -10,6 +11,7 @@ public class BuildVisibility{
     shown = new BuildVisibility(() -> true),
     debugOnly = new BuildVisibility(() -> false),
     editorOnly = new BuildVisibility(() -> Vars.state.rules.editor),
+    coreZoneOnly = new BuildVisibility(() -> Vars.indexer.isBlockPresent(Blocks.coreZone)),
     worldProcessorOnly = new BuildVisibility(() -> Vars.state.rules.editor || Vars.state.rules.allowEditWorldProcessors),
     sandboxOnly = new BuildVisibility(() -> Vars.state == null || Vars.state.rules.infiniteResources),
     campaignOnly = new BuildVisibility(() -> Vars.state == null || Vars.state.isCampaign()),