diff --git a/core/assets-raw/sprites/blocks/environment/arkycite-floor.png b/core/assets-raw/sprites/blocks/environment/arkycite-floor.png
new file mode 100644
index 0000000000..8d2645922b
Binary files /dev/null and b/core/assets-raw/sprites/blocks/environment/arkycite-floor.png differ
diff --git a/core/assets-raw/sprites/items/liquid-arkycite.png b/core/assets-raw/sprites/items/liquid-arkycite.png
new file mode 100644
index 0000000000..57599983c2
Binary files /dev/null and b/core/assets-raw/sprites/items/liquid-arkycite.png differ
diff --git a/core/assets/bundles/bundle.properties b/core/assets/bundles/bundle.properties
index 0f5e630c43..19b12019d6 100644
--- a/core/assets/bundles/bundle.properties
+++ b/core/assets/bundles/bundle.properties
@@ -796,6 +796,7 @@ ability.energyfield = Energy Field: [accent]{0}[] damage ~ [accent]{1}[] blocks
 bar.drilltierreq = Better Drill Required
 bar.noresources = Missing Resources
 bar.corereq = Core Base Required
+bar.cargounitcap = Cargo Unit Cap Reached
 bar.drillspeed = Drill Speed: {0}/s
 bar.pumpspeed = Pump Speed: {0}/s
 bar.efficiency = Efficiency: {0}%
diff --git a/core/assets/icons/icons.properties b/core/assets/icons/icons.properties
index 13172138a3..44972c897f 100755
--- a/core/assets/icons/icons.properties
+++ b/core/assets/icons/icons.properties
@@ -465,3 +465,5 @@
 63241=unit-cargo-loader|block-unit-cargo-loader-ui
 63240=unit-cargo-unload-point|block-unit-cargo-unload-point-ui
 63239=manifold|unit-manifold-ui
+63238=arkycite-floor|block-arkycite-floor-ui
+63237=arkycite|liquid-arkycite-ui
diff --git a/core/assets/logicids.dat b/core/assets/logicids.dat
index de04a9e6fd..f89741c46e 100644
Binary files a/core/assets/logicids.dat and b/core/assets/logicids.dat differ
diff --git a/core/assets/shaders/arkycite.frag b/core/assets/shaders/arkycite.frag
new file mode 100644
index 0000000000..bd677d5e44
--- /dev/null
+++ b/core/assets/shaders/arkycite.frag
@@ -0,0 +1,55 @@
+#define HIGHP
+
+//shades of slag
+#define S2 vec3(89.0, 150.0, 62.0) / 255.0
+#define S1 vec3(112.0, 181.0, 81.0) / 255.0
+#define MINSHADE vec4(68.0, 118.0, 66.0, 255.0) / 255.0
+
+#define NSCALE 170.0 / 2.0
+#define DSCALE 160.0 / 2.0
+
+uniform sampler2D u_texture;
+uniform sampler2D u_noise;
+
+uniform vec2 u_campos;
+uniform vec2 u_resolution;
+uniform float u_time;
+
+varying vec2 v_texCoords;
+
+void main(){
+    vec2 c = v_texCoords.xy;
+    vec2 coords = vec2(c.x * u_resolution.x + u_campos.x, c.y * u_resolution.y + u_campos.y);
+
+    vec4 orig = texture2D(u_texture, c);
+
+    float atime = u_time / 15000.0;
+    float noise = (texture2D(u_noise, (coords) / DSCALE + vec2(atime) * vec2(-0.9, 0.8)).r + texture2D(u_noise, (coords) / DSCALE + vec2(atime * 1.1) * vec2(0.8, -1.0)).r) / 2.0;
+
+    noise = abs(noise - 0.5) * 7.0 + 0.23;
+
+    float btime = u_time / 9000.0;
+
+    c += (vec2(
+        texture2D(u_noise, (coords) / NSCALE + vec2(btime) * vec2(-0.9, 0.8)).r,
+        texture2D(u_noise, (coords) / NSCALE + vec2(btime * 1.1) * vec2(0.8, -1.0)).r
+    ) - vec2(0.5)) * 20.0 / u_resolution;
+
+    vec4 color = texture2D(u_texture, c);
+
+    if(noise > 0.85){
+        if(color.g >= (S2).g - 0.1){
+            color.rgb = S1;
+        }else{
+            color.rgb = S2;
+        }
+    }else if(noise > 0.5){
+        color.rgb = S2;
+    }
+
+    if(orig.r > 0.01){
+        color = max(MINSHADE, color);
+    }
+
+    gl_FragColor = color;
+}
diff --git a/core/src/mindustry/ai/types/CargoAI.java b/core/src/mindustry/ai/types/CargoAI.java
index 9c60c0d495..49b6d8f419 100644
--- a/core/src/mindustry/ai/types/CargoAI.java
+++ b/core/src/mindustry/ai/types/CargoAI.java
@@ -57,6 +57,13 @@ public class CargoAI extends AIController{
                     }
                 }
             }else{
+
+                //what if some prankster reconfigures the source while the unit is moving? we can't have that!
+                if(unloadTarget.item != itemTarget){
+                    unloadTarget = null;
+                    return;
+                }
+
                 moveTo(unloadTarget, moveRange, moveSmoothing);
 
                 //deposit in bursts, unloading can take a while
diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index 3583b8cc4c..5172cb1808 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -39,6 +39,7 @@ public class Blocks{
     //environment
     air, spawn, cliff, deepwater, water, taintedWater, deepTaintedWater, tar, slag, cryofluid, stone, craters, charr, sand, darksand, dirt, mud, ice, snow, darksandTaintedWater, space, empty,
     dacite, rhyolite, rhyoliteCrater, regolith, yellowStone, redIce,
+    arkyciteFloor,
     redmat, bluemat,
     stoneWall, dirtWall, sporeWall, iceWall, daciteWall, sporePine, snowPine, pine, shrubs, whiteTree, whiteTreeDead, sporeCluster,
     redweed, purbush, coralChunk, yellowCoral,
@@ -388,6 +389,20 @@ public class Blocks{
             attributes.set(Attribute.water, 0.4f);
         }};
 
+        arkyciteFloor = new Floor("arkycite-floor"){{
+            speedMultiplier = 0.3f;
+            variants = 0;
+            liquidDrop = Liquids.arkycite;
+            liquidMultiplier = 1.5f;
+            isLiquid = true;
+            //TODO status, cache layer for this crap
+            status = StatusEffects.wet;
+            statusDuration = 120f;
+            drownTime = 200f;
+            cacheLayer = CacheLayer.arkycite;
+            albedo = 0.9f;
+        }};
+
         redmat = new Floor("redmat");
         bluemat = new Floor("bluemat");
 
diff --git a/core/src/mindustry/content/Liquids.java b/core/src/mindustry/content/Liquids.java
index 52b230812f..f2767585fe 100644
--- a/core/src/mindustry/content/Liquids.java
+++ b/core/src/mindustry/content/Liquids.java
@@ -5,7 +5,7 @@ import mindustry.type.*;
 
 public class Liquids{
     public static Liquid water, slag, oil, cryofluid, neoplasm,
-    gallium,
+    arkycite, gallium,
     ozone, hydrogen, nitrogen, cyanogen;
 
     public static void load(){
@@ -56,6 +56,12 @@ public class Liquids{
             colorTo = Color.valueOf("9e172c");
         }};
 
+        //TODO
+        arkycite = new Liquid("arkycite", Color.valueOf("59963e")){{
+            flammability = 0.4f;
+            viscosity = 0.7f;
+        }};
+
         gallium = new Liquid("gallium", Color.valueOf("9a9dbf")){{
 
         }};
diff --git a/core/src/mindustry/content/UnitTypes.java b/core/src/mindustry/content/UnitTypes.java
index 6c90ea8f72..83c01006ae 100644
--- a/core/src/mindustry/content/UnitTypes.java
+++ b/core/src/mindustry/content/UnitTypes.java
@@ -2637,6 +2637,9 @@ public class UnitTypes{
             engineSize = 2.3f;
             engineOffset = 6.5f;
 
+            //should not appear anywhere, it's for internal use only and will despawn
+            hidden = true;
+
             setEnginesMirror(
                 new UnitEngine(24 / 4f, -24 / 4f, 2.3f, 315f)
             );
diff --git a/core/src/mindustry/graphics/CacheLayer.java b/core/src/mindustry/graphics/CacheLayer.java
index 3921612853..746c39a8b4 100644
--- a/core/src/mindustry/graphics/CacheLayer.java
+++ b/core/src/mindustry/graphics/CacheLayer.java
@@ -10,7 +10,7 @@ import static mindustry.Vars.*;
 public class CacheLayer{
     public static CacheLayer
 
-    water, mud, cryofluid, tar, slag, space, normal, walls;
+    water, mud, cryofluid, tar, slag, arkycite, space, normal, walls;
 
     public static CacheLayer[] all = {};
 
@@ -37,6 +37,7 @@ public class CacheLayer{
             mud = new ShaderLayer(Shaders.mud),
             tar = new ShaderLayer(Shaders.tar),
             slag = new ShaderLayer(Shaders.slag),
+            arkycite = new ShaderLayer(Shaders.arkycite),
             cryofluid = new ShaderLayer(Shaders.cryofluid),
             space = new ShaderLayer(Shaders.space),
             normal = new CacheLayer(),
diff --git a/core/src/mindustry/graphics/Shaders.java b/core/src/mindustry/graphics/Shaders.java
index 3a53f6d83c..c598119817 100644
--- a/core/src/mindustry/graphics/Shaders.java
+++ b/core/src/mindustry/graphics/Shaders.java
@@ -21,7 +21,7 @@ public class Shaders{
     public static UnitBuildShader build;
     public static DarknessShader darkness;
     public static LightShader light;
-    public static SurfaceShader water, mud, tar, slag, cryofluid, space, caustics;
+    public static SurfaceShader water, mud, tar, slag, cryofluid, space, caustics, arkycite;
     public static PlanetShader planet;
     public static CloudShader clouds;
     public static PlanetGridShader planetGrid;
@@ -45,6 +45,7 @@ public class Shaders{
         darkness = new DarknessShader();
         light = new LightShader();
         water = new SurfaceShader("water");
+        arkycite = new SurfaceShader("arkycite");
         mud = new SurfaceShader("mud");
         tar = new SurfaceShader("tar");
         slag = new SurfaceShader("slag");
diff --git a/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java b/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
index d7d0ffaebe..f0a2ef5b0b 100644
--- a/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
+++ b/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
@@ -112,7 +112,6 @@ public class ErekirPlanetGenerator extends PlanetGenerator{
                     float noise = noise(x + 782, y, 7, 0.8f, 280f, 1f);
                     if(noise > 0.62f){
                         if(noise > 0.635f){
-                            //TODO slag must be rounded, no single occurrences
                             floor = Blocks.slag;
                         }else{
                             floor = Blocks.yellowStone;
diff --git a/core/src/mindustry/world/blocks/units/UnitCargoLoader.java b/core/src/mindustry/world/blocks/units/UnitCargoLoader.java
index 74eaa3da58..e72fac48da 100644
--- a/core/src/mindustry/world/blocks/units/UnitCargoLoader.java
+++ b/core/src/mindustry/world/blocks/units/UnitCargoLoader.java
@@ -6,8 +6,10 @@ import arc.graphics.g2d.*;
 import arc.math.*;
 import arc.util.*;
 import arc.util.io.*;
+import mindustry.*;
 import mindustry.content.*;
 import mindustry.entities.*;
+import mindustry.game.*;
 import mindustry.gen.*;
 import mindustry.graphics.*;
 import mindustry.type.*;
@@ -49,6 +51,20 @@ public class UnitCargoLoader extends Block{
         ));
     }
 
+    @Override
+    public boolean canPlaceOn(Tile tile, Team team, int rotation){
+        return super.canPlaceOn(tile, team, rotation) && Units.canCreate(team, unitType);
+    }
+
+    @Override
+    public void drawPlace(int x, int y, int rotation, boolean valid){
+        super.drawPlace(x, y, rotation, valid);
+
+        if(!Units.canCreate(Vars.player.team(), unitType)){
+            drawPlaceText(Core.bundle.get("@bar.cargounitcap"), x, y, valid);
+        }
+    }
+
     public class UnitTransportSourceBuild extends Building{
         //needs to be "unboxed" after reading, since units are read after buildings.
         public int readUnitId = -1;
diff --git a/gradle.properties b/gradle.properties
index 611d472faa..b6d9a4be8e 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -24,4 +24,4 @@ android.useAndroidX=true
 #used for slow jitpack builds; TODO see if this actually works
 org.gradle.internal.http.socketTimeout=100000
 org.gradle.internal.http.connectionTimeout=100000
-archash=00d1f312
+archash=f9abed08