Auto-despawn core units

core/src/mindustry/content/Fx.java

@@ -54,6 +54,21 @@ public class Fx{
         reset();
     }),
 
+    unitDespawn = new Effect(100f, e -> {
+        if(!(e.data instanceof Unitc)) return;
+
+        Unitc select = (Unitc)e.data;
+        float scl = e.fout(Interp.pow2Out);
+        float p = Draw.scl;
+        Draw.scl *= scl;
+
+        mixcol(Pal.accent, 1f);
+        rect(select.type().icon(Cicon.full), select.x(), select.y(), select.rotation() - 90f);
+        reset();
+
+        Draw.scl = p;
+    }),
+
     unitSpirit = new Effect(17f, e -> {
         if(!(e.data instanceof Position)) return;
         Position to = e.data();

core/src/mindustry/entities/comp/UnitComp.java

@@ -24,6 +24,7 @@ abstract class UnitComp implements Healthc, Physicsc, Hitboxc, Statusc, Teamc, I
 
     private transient UnitController controller;
     private UnitType type;
+    boolean spawnedByCore;
 
     public void moveAt(Vec2 vector){
         moveAt(vector, type.accel);
@@ -171,6 +172,12 @@ abstract class UnitComp implements Healthc, Physicsc, Hitboxc, Statusc, Teamc, I
         }
 
         controller.update();
+
+        //remove units spawned by the core
+        if(spawnedByCore && !(controller instanceof Playerc)){
+            Fx.unitDespawn.at(x, y, 0, this);
+            remove();
+        }
     }
 
     @Override

core/src/mindustry/world/blocks/storage/CoreBlock.java

@@ -49,6 +49,7 @@ public class CoreBlock extends StorageBlock{
         unit.set(entity);
         unit.impulse(0f, 8f);
         unit.controller(player);
+        unit.spawnedByCore(true);
         unit.add();
     }