diff --git a/src/main/java/WayofTime/bloodmagic/api/ritual/AreaDescriptor.java b/src/main/java/WayofTime/bloodmagic/api/ritual/AreaDescriptor.java
index dd1c59f1..4338a9e3 100644
--- a/src/main/java/WayofTime/bloodmagic/api/ritual/AreaDescriptor.java
+++ b/src/main/java/WayofTime/bloodmagic/api/ritual/AreaDescriptor.java
@@ -1,6 +1,7 @@
 package WayofTime.bloodmagic.api.ritual;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 import net.minecraft.util.AxisAlignedBB;
@@ -71,7 +72,7 @@ public class AreaDescriptor
                 cachedPosition = pos;
             }
 
-            return blockPosCache;
+            return Collections.unmodifiableList(blockPosCache);
         }
 
         @Override