diff --git a/core/assets-raw/sprites/units/spark-cell.png b/core/assets-raw/sprites/units/evoke-cell.png
similarity index 100%
rename from core/assets-raw/sprites/units/spark-cell.png
rename to core/assets-raw/sprites/units/evoke-cell.png
diff --git a/core/assets-raw/sprites/units/spark.png b/core/assets-raw/sprites/units/evoke.png
similarity index 100%
rename from core/assets-raw/sprites/units/spark.png
rename to core/assets-raw/sprites/units/evoke.png
diff --git a/core/src/mindustry/content/Items.java b/core/src/mindustry/content/Items.java
index 0d46ffed29..4e09984dbf 100644
--- a/core/src/mindustry/content/Items.java
+++ b/core/src/mindustry/content/Items.java
@@ -8,7 +8,7 @@ public class Items implements ContentList{
     public static Item
     scrap, copper, lead, graphite, coal, titanium, thorium, silicon, plastanium,
     phaseFabric, surgeAlloy, sporePod, sand, blastCompound, pyratite, metaglass,
-    beryllium, fissileMatter, dormantCyst, tungsten;
+    beryllium, fissileMatter, dormantCyst, tungsten, carbide;
 
     @Override
     public void load(){
@@ -108,6 +108,13 @@ public class Items implements ContentList{
 
         tungsten = new Item("tungsten", Color.valueOf("768a9a")){{
             hardness = 5;
+            cost = 1.2f;
+        }};
+
+        //TODO carbide impl
+
+        carbide = new Item("carbide", Color.valueOf("768a9a")){{
+            cost = 1.3f;
         }};
     }
 }
diff --git a/core/src/mindustry/world/blocks/production/BurstDrill.java b/core/src/mindustry/world/blocks/production/BurstDrill.java
index 20733c8843..86c12320bc 100644
--- a/core/src/mindustry/world/blocks/production/BurstDrill.java
+++ b/core/src/mindustry/world/blocks/production/BurstDrill.java
@@ -16,7 +16,7 @@ public class BurstDrill extends Drill{
     public @Load("@-arrow") TextureRegion arrowRegion;
     public @Load("@-arrow-blur") TextureRegion arrowBlurRegion;
 
-    public float invertedTime = 190f;
+    public float invertedTime = 200f;
     public float arrowSpacing = 4f;
     public Color arrowColor = Color.valueOf("feb380"), baseArrowColor = Color.valueOf("6e7080");