diff --git a/core/src/mindustry/content/ErekirTechTree.java b/core/src/mindustry/content/ErekirTechTree.java
index 21d894257a..c4b14a8a5f 100644
--- a/core/src/mindustry/content/ErekirTechTree.java
+++ b/core/src/mindustry/content/ErekirTechTree.java
@@ -226,14 +226,14 @@ public class ErekirTechTree{
                     });
                 });
 
-                node(shipAssembler, Seq.with(tmpNever), () -> {
+                node(shipAssembler, () -> {
                     node(UnitTypes.quell, () -> {
                         node(UnitTypes.disrupt, Seq.with(tmpNever), () -> {
 
                         });
                     });
 
-                    node(mechAssembler, () -> {
+                    node(mechAssembler, Seq.with(tmpNever), () -> {
                         node(UnitTypes.bulwark, () -> {
                             node(UnitTypes.krepost, Seq.with(tmpNever), () -> {
 
diff --git a/core/src/mindustry/content/Planets.java b/core/src/mindustry/content/Planets.java
index c3c2f7c25c..95df967cfb 100644
--- a/core/src/mindustry/content/Planets.java
+++ b/core/src/mindustry/content/Planets.java
@@ -60,6 +60,7 @@ public class Planets{
             totalRadius += 2.6f;
             lightSrcTo = 0.5f;
             lightDstFrom = 0.2f;
+            clearSectorOnLose = true;
             hiddenItems.addAll(Items.serpuloItems).removeAll(Items.erekirItems);
             ruleSetter = r -> {
                 r.unitCommand = true;
diff --git a/core/src/mindustry/core/Control.java b/core/src/mindustry/core/Control.java
index 973b127ef1..d48b65a635 100644
--- a/core/src/mindustry/core/Control.java
+++ b/core/src/mindustry/core/Control.java
@@ -346,7 +346,7 @@ public class Control implements ApplicationListener, Loadable{
             ui.planet.hide();
             SaveSlot slot = sector.save;
             sector.planet.setLastSector(sector);
-            if(slot != null && !clearSectors){
+            if(slot != null && !clearSectors && (!sector.planet.clearSectorOnLose || sector.info.hasCore)){
 
                 try{
                     boolean hadNoCore = !sector.info.hasCore;
diff --git a/core/src/mindustry/entities/Effect.java b/core/src/mindustry/entities/Effect.java
index 9104b870ec..c3f6fd9ec5 100644
--- a/core/src/mindustry/entities/Effect.java
+++ b/core/src/mindustry/entities/Effect.java
@@ -280,6 +280,10 @@ public class Effect{
             return (T)data;
         }
 
+        public EffectContainer inner(){
+            return innerContainer == null ? (innerContainer = new EffectContainer()) : innerContainer;
+        }
+
         public void scaled(float lifetime, Cons<EffectContainer> cons){
             if(innerContainer == null) innerContainer = new EffectContainer();
             if(time <= lifetime){
diff --git a/core/src/mindustry/entities/effect/SeqEffect.java b/core/src/mindustry/entities/effect/SeqEffect.java
new file mode 100644
index 0000000000..0ac1179cac
--- /dev/null
+++ b/core/src/mindustry/entities/effect/SeqEffect.java
@@ -0,0 +1,46 @@
+package mindustry.entities.effect;
+
+import mindustry.entities.*;
+
+/**
+ * Renders multiple particle effects in sequence.
+ * Will not work correctly for effects that modify life dynamically.
+ * */
+public class SeqEffect extends Effect{
+    public Effect[] effects = {};
+
+    public SeqEffect(){
+        clip = 100f;
+    }
+
+    public SeqEffect(Effect... effects){
+        this();
+        this.effects = effects;
+    }
+
+    @Override
+    public void init(){
+        lifetime = 0f;
+        for(Effect f : effects){
+            f.init();
+            clip = Math.max(clip, f.clip);
+            lifetime += f.lifetime;
+        }
+    }
+
+    @Override
+    public void render(EffectContainer e){
+        var cont = e.inner();
+        float life = e.time, sum = 0f;
+        for(int i = 0; i < effects.length; i++){
+            var fx = effects[i];
+            if(life <= fx.lifetime + sum){
+                cont.set(e.id + i, e.color, life - sum, fx.lifetime, e.rotation, e.x, e.y, e.data);
+                fx.render(cont);
+                clip = Math.max(clip, fx.clip);
+                break;
+            }
+            sum += fx.lifetime;
+        }
+    }
+}
diff --git a/core/src/mindustry/type/Planet.java b/core/src/mindustry/type/Planet.java
index 5e5839017d..5798ac0934 100644
--- a/core/src/mindustry/type/Planet.java
+++ b/core/src/mindustry/type/Planet.java
@@ -93,6 +93,8 @@ public class Planet extends UnlockableContent{
     public boolean allowSectorInvasion = false;
     /** If true, builder AI is turned on for all sectors on this planet by default. */
     public boolean defaultAI = false;
+    /** If true, sectors saves are cleared when lost. */
+    public boolean clearSectorOnLose = false;
     /** Sets up rules on game load for any sector on this planet. */
     public Cons<Rules> ruleSetter = r -> {};
     /** Parent body that this planet orbits around. If null, this planet is considered to be in the middle of the solar system.*/