Necropolis and mine walls (#20578)

Resources/Prototypes/Entities/Structures/Wallmounts/Signs/signs.yml

@@ -1273,3 +1273,21 @@
   components:
   - type: Sprite
     state: zero
+
+- type: entity
+  parent: BaseSign
+  id: SignSurvival
+  name: survival sign
+  description: A sign. "Survival" is written on it.
+  components:
+  - type: Sprite
+    state: survival
+
+- type: entity
+  parent: BaseSign
+  id: SignNTMine
+  name: mine sign
+  description: A sign. "Mine" is written on it.
+  components:
+  - type: Sprite
+    state: ntmining

Resources/Prototypes/Entities/Structures/Walls/walls.yml

@@ -970,6 +970,79 @@
     node: wall
 
 
+# Lavalend Walls
+
+- type: entity
+  parent: BaseWall
+  id: WallNecropolis
+  name: stone wall
+  components:
+  - type: Tag
+    tags:
+      - Wall
+  - type: Sprite
+    sprite: Structures/Walls/necropolis.rsi
+  - type: Icon
+    sprite: Structures/Walls/necropolis.rsi
+  - type: Destructible
+    thresholds:
+    - trigger:
+        !type:DamageTrigger
+        damage: 1000
+      behaviors:
+      - !type:DoActsBehavior
+        acts: [ "Destruction" ]
+  - type: IconSmooth
+    key: walls
+    base: necropolis
+
+- type: entity
+  parent: BaseWall
+  id: WallMining
+  name: wall
+  components:
+  - type: Tag
+    tags:
+      - Wall
+  - type: Sprite
+    sprite: Structures/Walls/mining.rsi
+  - type: Icon
+    sprite: Structures/Walls/mining.rsi
+  - type: Destructible
+    thresholds:
+    - trigger:
+        !type:DamageTrigger
+        damage: 700
+      behaviors:
+      - !type:DoActsBehavior
+        acts: [ "Destruction" ]
+  - type: IconSmooth
+    key: walls
+    base: mining
+
+- type: entity
+  parent: WallShuttleDiagonal
+  id: WallMiningDiagonal
+  name: wall
+  suffix: diagonal
+  placement:
+    mode: SnapgridCenter
+    snap:
+    - Wall
+  components:
+  - type: Sprite
+    drawdepth: Walls
+    sprite: Structures/Walls/mining_diagonal.rsi
+    state: state0
+  - type: IconSmooth
+    mode: Diagonal
+    key: walls
+    base: state
+  - type: Icon
+    sprite: Structures/Walls/mining_diagonal.rsi
+    state: state0
+
+
 # Vault Walls
 
 - type: entity