diff --git a/core/assets-raw/sprites/blocks/props/crystal-blocks1.png b/core/assets-raw/sprites/blocks/props/crystal-blocks1.png
new file mode 100644
index 0000000000..838aaaba7f
Binary files /dev/null and b/core/assets-raw/sprites/blocks/props/crystal-blocks1.png differ
diff --git a/core/assets-raw/sprites/blocks/props/red-ice-boulder1.png b/core/assets-raw/sprites/blocks/props/red-ice-boulder1.png
new file mode 100644
index 0000000000..6a3719383e
Binary files /dev/null and b/core/assets-raw/sprites/blocks/props/red-ice-boulder1.png differ
diff --git a/core/assets-raw/sprites/blocks/props/red-ice-boulder2.png b/core/assets-raw/sprites/blocks/props/red-ice-boulder2.png
new file mode 100644
index 0000000000..64913660e4
Binary files /dev/null and b/core/assets-raw/sprites/blocks/props/red-ice-boulder2.png differ
diff --git a/core/assets-raw/sprites/blocks/props/red-ice-boulder3.png b/core/assets-raw/sprites/blocks/props/red-ice-boulder3.png
new file mode 100644
index 0000000000..ebb2cb653f
Binary files /dev/null and b/core/assets-raw/sprites/blocks/props/red-ice-boulder3.png differ
diff --git a/core/assets/icons/icons.properties b/core/assets/icons/icons.properties
index adb53e1a86..18c7e7109b 100755
--- a/core/assets/icons/icons.properties
+++ b/core/assets/icons/icons.properties
@@ -506,3 +506,4 @@
 63198=crystalline-boulder|block-crystalline-boulder-ui
 63197=crystal-floor|block-crystal-floor-ui
 63196=vibrant-crystal-cluster|block-vibrant-crystal-cluster-ui
+63195=red-ice-boulder|block-red-ice-boulder-ui
diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index afd76fd7d7..0d49e62e1d 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -49,7 +49,8 @@ public class Blocks{
     ferricStone, ferricCraters, carbonStone, beryllicStone, crystallineStone, crystalFloor,
     iceSnow, sandWater, darksandWater, duneWall, sandWall, moss, sporeMoss, shale, shaleWall, grass, salt,
     //boulders
-    shaleBoulder, sandBoulder, daciteBoulder, boulder, snowBoulder, basaltBoulder, carbonBoulder, ferricBoulder, beryllicBoulder, yellowStoneBoulder, arkyicBoulder, crystalCluster, vibrantCrystalCluster, crystallineBoulder,
+    shaleBoulder, sandBoulder, daciteBoulder, boulder, snowBoulder, basaltBoulder, carbonBoulder, ferricBoulder, beryllicBoulder, yellowStoneBoulder,
+    arkyicBoulder, crystalCluster, vibrantCrystalCluster, crystallineBoulder, redIceBoulder,
     metalFloor, metalFloorDamaged, metalFloor2, metalFloor3, metalFloor4, metalFloor5, basalt, magmarock, hotrock, snowWall, saltWall,
     darkPanel1, darkPanel2, darkPanel3, darkPanel4, darkPanel5, darkPanel6, darkMetal,
     pebbles, tendrils,
@@ -672,6 +673,11 @@ public class Blocks{
             crystallineStone.asFloor().decoration = this;
         }};
 
+        redIceBoulder = new Prop("red-ice-boulder"){{
+            variants = 3;
+            redIce.asFloor().decoration = this;
+        }};
+
         metalFloor = new Floor("metal-floor", 0);
         metalFloorDamaged = new Floor("metal-floor-damaged", 3);
 
diff --git a/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java b/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
index 75da1ed535..6d46b778e9 100644
--- a/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
+++ b/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
@@ -140,6 +140,7 @@ public class ErekirPlanetGenerator extends PlanetGenerator{
 
         //arkycite
         //TODO arkycite biome
+        //TODO ice biome
         pass((x, y) -> {
             if(nearWall(x, y)) return;
 
@@ -184,10 +185,9 @@ public class ErekirPlanetGenerator extends PlanetGenerator{
         //make sure enemies have room
         erase(endX, endY, 6);
 
-        tiles.getn(endX, endY).setOverlay(Blocks.spawn);
+        //TODO enemies get stuck on 1x1 passages.
 
-        //TODO tech is lazy and boring
-        //tech(Blocks.darkPanel3, Blocks.darkPanel5, Blocks.darkMetal);
+        tiles.getn(endX, endY).setOverlay(Blocks.spawn);
 
         //ores
         pass((x, y) -> {
@@ -199,10 +199,6 @@ public class ErekirPlanetGenerator extends PlanetGenerator{
                     }else if(block != Blocks.carbonWall && noise(x + 782, y, 4, 0.8f, 38f, 1f) > 0.665f){
                         ore = Blocks.wallOreBeryl;
                     }
-                    //TODO generate tungsten, or not?
-                    //else if(block == Blocks.yellowStoneWall && noise(x, y + 942, 4, 0.7f, 38f, 1f) > 0.71f){
-                    //    ore = Blocks.wallOreTungsten;
-                    //}
                 }
             }else if(!nearWall(x, y)){