diff --git a/data/mods/Xedra_Evolved/connect_groups.json b/data/mods/Xedra_Evolved/connect_groups.json
new file mode 100644
index 0000000000000..ccc0903948baa
--- /dev/null
+++ b/data/mods/Xedra_Evolved/connect_groups.json
@@ -0,0 +1,6 @@
+[
+  {
+    "type": "connect_group",
+    "id": "OBSIDIANFLOOR"
+  }
+]
diff --git a/data/mods/Xedra_Evolved/field_type.json b/data/mods/Xedra_Evolved/field_type.json
index d18b4293ecebe..11db655651bcb 100644
--- a/data/mods/Xedra_Evolved/field_type.json
+++ b/data/mods/Xedra_Evolved/field_type.json
@@ -140,7 +140,6 @@
   {
     "id": "fd_pollen_arvore_weaken",
     "type": "field_type",
-    "legacy_enum_id": 51,
     "intensity_levels": [
       {
         "name": "pollen cloud",
@@ -194,5 +193,16 @@
     "display_items": false,
     "display_field": true,
     "looks_like": "fd_nuke_gas"
+  },
+  {
+    "id": "fd_sylph_solid_fog",
+    "type": "field_type",
+    "looks_like": "fd_fog",
+    "intensity_levels": [ { "name": "solid fog", "sym": "*", "translucency": 99, "move_cost": -1, "transparent": false, "light_override": 0 } ],
+    "half_life": 999999999999,
+    "percent_spread": 0,
+    "phase": "gas",
+    "display_items": false,
+    "display_field": true
   }
 ]
diff --git a/data/mods/Xedra_Evolved/furniture_and_terrain/terrain-eruption.json b/data/mods/Xedra_Evolved/furniture_and_terrain/terrain-eruption.json
new file mode 100644
index 0000000000000..c8fafedc65488
--- /dev/null
+++ b/data/mods/Xedra_Evolved/furniture_and_terrain/terrain-eruption.json
@@ -0,0 +1,109 @@
+[
+  {
+    "type": "terrain",
+    "id": "t_solid_fog",
+    "name": "wall of fog",
+    "looks_like": "fd_fog",
+    "description": "A wall of swirling fog.  Despite its constant movement, it never spreads out or escapes the rough wall-shape it's in.",
+    "symbol": "LINE_OXOX",
+    "color": "light_gray",
+    "move_cost": 0,
+    "coverage": 100,
+    "flags": [ "NOITEM", "WALL", "NO_SCENT", "AUTO_WALL_SYMBOL", "CONNECT_WITH_WALL", "BLOCK_WIND" ]
+  },
+  {
+    "type": "terrain",
+    "id": "t_obsidian_wall",
+    "name": "obsidian rock",
+    "looks_like": "t_rock",
+    "description": "A rough wall of igneous stone.  It does not look like polished obsidian but you can see some resemblance.",
+    "symbol": "LINE_OXOX",
+    "//": "use pillars, 't_column_obsidian', as a compliment.",
+    "color": "white",
+    "move_cost": 0,
+    "coverage": 100,
+    "roof": "t_obsidian_roof",
+    "flags": [ "NOITEM", "SUPPORTS_ROOF", "WALL", "NO_SCENT", "AUTO_WALL_SYMBOL", "CONNECT_WITH_WALL", "MINEABLE", "BLOCK_WIND" ],
+    "bash": {
+      "str_min": 120,
+      "str_max": 400,
+      "sound": "crash!",
+      "sound_fail": "whump!",
+      "ter_set": "t_rock_floor",
+      "items": [ { "item": "obsidian_rock", "count": [ 6, 12 ] }, { "item": "material_rocksalt", "count": [ 0, 1 ], "prob": 10 } ]
+    }
+  },
+  {
+    "type": "terrain",
+    "id": "t_obsidian_floor",
+    "name": "obsidian floor",
+    "description": "A relatively flat area of igneous rock.  Looks stable enough to be mined with the proper mining gear.",
+    "symbol": ".",
+    "color": "light_gray",
+    "connect_groups": "OBSIDIANFLOOR",
+    "connects_to": "OBSIDIANFLOOR",
+    "move_cost": 2,
+    "roof": "t_obsidian_roof",
+    "flags": [ "TRANSPARENT", "INDOORS", "COLLAPSES", "SUPPORTS_ROOF", "FLAT", "ROAD" ],
+    "bash": { "ter_set": "t_null", "str_min": 75, "str_max": 400, "str_min_supported": 100, "bash_below": true }
+  },
+  {
+    "type": "terrain",
+    "id": "t_column_obsidian",
+    "name": "column",
+    "looks_like": "t_rock_wall",
+    "description": "A natural column of igneous rock.",
+    "symbol": "1",
+    "color": "light_gray",
+    "move_cost": 0,
+    "coverage": 80,
+    "flags": [ "WALL", "PERMEABLE", "MINEABLE" ],
+    "bash": {
+      "str_min": 120,
+      "str_max": 200,
+      "sound": "crash!",
+      "sound_fail": "whump!",
+      "ter_set": "t_reb_cage",
+      "items": [ { "item": "obsidian_rock", "count": [ 10, 22 ] } ]
+    }
+  },
+  {
+    "type": "terrain",
+    "id": "t_obsidian_roof",
+    "name": "obsidian roof",
+    "description": "A section of flat igneous rock.",
+    "looks_like": "t_rock_floor",
+    "symbol": ".",
+    "color": "brown",
+    "move_cost": 2,
+    "flags": [ "TRANSPARENT", "FLAT" ],
+    "bash": { "str_min": 100, "str_max": 210, "sound": "crash!", "sound_fail": "whump!", "ter_set": "t_hole", "bash_below": false }
+  },
+  {
+    "type": "terrain",
+    "id": "t_salamander_veins",
+    "name": "salamander vein",
+    "looks_like": "t_pillar",
+    "description": "A vein of rare materials that appear during an eruption.",
+    "symbol": "1",
+    "color": "light_gray",
+    "move_cost": 0,
+    "coverage": 80,
+    "flags": [ "WALL", "PERMEABLE", "MINEABLE" ],
+    "bash": {
+      "str_min": 120,
+      "str_max": 200,
+      "sound": "crash!",
+      "sound_fail": "whump!",
+      "ter_set": "t_obsidian_floor",
+      "items": [
+        { "item": "obsidian_rock", "count": [ 10, 22 ] },
+        { "item": "copper", "count": [ 0, 750 ], "prob": 80 },
+        { "item": "silver_small", "count": [ 0, 250 ], "prob": 60 },
+        { "item": "gold_small", "count": [ 0, 100 ], "prob": 40 },
+        { "item": "platinum_small", "count": [ 0, 25 ], "prob": 20 },
+        { "item": "scrap_moon_tears", "count": [ 0, 10 ], "prob": 10 }
+      ]
+    }
+  }
+]
diff --git a/data/mods/Xedra_Evolved/items/resources.json b/data/mods/Xedra_Evolved/items/resources.json
index bf9147ec34bf5..dfd27424a5898 100644
--- a/data/mods/Xedra_Evolved/items/resources.json
+++ b/data/mods/Xedra_Evolved/items/resources.json
@@ -235,5 +235,13 @@
     "color": "brown",
     "name": { "str": "treesung log" },
     "description": "A large log of living wood, sung from a tree by elemental magick."
+  },
+  {
+    "type": "GENERIC",
+    "id": "obsidian_rock",
+    "copy-from": "rock",
+    "name": { "str": "chunk of obsidian", "str_pl": "chunks of obsidian" },
+    "color": "black",
+    "description": "A chunk of obsidian, smashed from a larger rock vein.  It has several wickedly sharp edges and could probably be formed into a weapon with some work."
   }
 ]
diff --git a/data/mods/Xedra_Evolved/mapgen/genius_locum.json b/data/mods/Xedra_Evolved/mapgen/genius_locum.json
index 3af8ae43ad99e..087d63d2db872 100644
--- a/data/mods/Xedra_Evolved/mapgen/genius_locum.json
+++ b/data/mods/Xedra_Evolved/mapgen/genius_locum.json
@@ -60,12 +60,13 @@
         ".": "t_rock_floor",
         "X": "t_rock_floor",
         "b": "t_rock_floor",
-        "1": "t_rock_floor",
+        "1": "t_dirt",
+        "4": "t_dirt",
         "-": [ [ "t_region_groundcover_urban", 5 ], "t_region_tree_shade", 2 ],
-        "#": "t_rock_wall"
+        "#": "t_rock_wall",
+        "|": [ [ "t_rock", 1 ], [ "t_soil", 1 ] ]
       },
       "furniture": {
-        "|": "f_hedge_tall",
         "b": "f_bench",
         "h": "f_bench",
         "X": "f_elemental_altar",
@@ -138,12 +139,13 @@
         ".": "t_rock_floor",
         "X": "t_rock_floor",
         "b": "t_rock_floor",
-        "1": "t_rock_floor",
+        "1": "t_dirt",
+        "4": "t_dirt",
         "-": [ [ "t_region_groundcover_urban", 5 ], "t_region_tree_shade", 2 ],
-        "#": "t_rock_wall"
+        "#": "t_rock_wall",
+        "|": "t_water_cube"
       },
       "furniture": {
-        "|": "f_hedge_tall",
         "b": "f_bench",
         "h": "f_bench",
         "X": "f_elemental_altar",
@@ -216,12 +218,13 @@
         ".": "t_rock_floor",
         "X": "t_rock_floor",
         "b": "t_rock_floor",
-        "1": "t_rock_floor",
+        "1": "t_dirt",
+        "4": "t_dirt",
         "-": [ [ "t_region_groundcover_urban", 5 ], "t_region_tree_shade", 2 ],
-        "#": "t_rock_wall"
+        "#": "t_rock_wall",
+        "|": "t_region_tree_shade"
       },
       "furniture": {
-        "|": "f_hedge_tall",
         "b": "f_bench",
         "h": "f_bench",
         "X": "f_elemental_altar",
@@ -297,12 +300,13 @@
         ".": "t_rock_floor",
         "X": "t_rock_floor",
         "b": "t_rock_floor",
-        "1": "t_rock_floor",
+        "1": "t_dirt",
+        "4": "t_dirt",
         "-": [ [ "t_region_groundcover_urban", 5 ], "t_region_tree_shade", 2 ],
-        "#": "t_rock_wall"
+        "#": "t_rock_wall",
+        "|": [ [ "t_obsidian_wall", 50 ], [ "t_salamander_veins", 10 ], [ "t_lava", 1 ] ]
       },
       "furniture": {
-        "|": "f_hedge_tall",
         "b": "f_bench",
         "h": "f_bench",
         "X": "f_elemental_altar",
@@ -375,12 +379,12 @@
         ".": "t_rock_floor",
         "X": "t_rock_floor",
         "b": "t_rock_floor",
-        "1": "t_rock_floor",
+        "1": "t_dirt",
+        "4": "t_dirt",
         "-": [ [ "t_region_groundcover_urban", 5 ], "t_region_tree_shade", 2 ],
         "#": "t_rock_wall"
       },
       "furniture": {
-        "|": "f_hedge_tall",
         "b": "f_bench",
         "h": "f_bench",
         "X": "f_elemental_altar",
@@ -389,6 +393,7 @@
         "3": "f_topiary_abstract",
         "4": "f_topiary_dragon"
       },
+      "fields": { "|": { "field": "fd_sylph_solid_fog", "intensity": 1 } },
       "item": { "X": { "item": "mutagen_airkin" } }
     }
   },
@@ -453,12 +458,13 @@
         ".": "t_rock_floor",
         "X": "t_rock_floor",
         "b": "t_rock_floor",
-        "1": "t_rock_floor",
+        "1": "t_dirt",
+        "4": "t_dirt",
         "-": [ [ "t_region_groundcover_urban", 5 ], "t_region_tree_shade", 2 ],
-        "#": "t_rock_wall"
+        "#": "t_rock_wall",
+        "|": [ [ "t_scrap_wall", 10 ], [ "t_scrap_wall_halfway", 2 ], [ "t_brick_wall", 10 ], [ "t_brick_wall_halfway", 2 ] ]
       },
       "furniture": {
-        "|": "f_hedge_tall",
         "b": "f_bench",
         "h": "f_bench",
         "X": "f_elemental_altar",
diff --git a/doc/JSON_INFO.md b/doc/JSON_INFO.md
index 68e7727fe1b79..f7cc633bf6f2c 100644
--- a/doc/JSON_INFO.md
+++ b/doc/JSON_INFO.md
@@ -6116,7 +6116,7 @@ Fields can exist on top of terrain/furniture, and support different intensity le
     "has_elec": false, // See has_fire
     "has_fume": false, // See has_fire, non-breathing monsters are immune to this field
     "display_items": true, // If the field should obscure items on this tile
-    "display_field": true, // If the field should obscure other fields
+    "display_field": true, // If the field has a visible sprite or symbol, default false
     "description_affix": "covered_in", // Description affix for items in this field, possible values are "in", "covered_in", "on", "under", and "illuminated_by"
     "wandering_field": "fd_toxic_gas", // Spawns the defined field in an `intensity-1` radius, or increases the intensity of such fields until their intensity is the same as the parent field
     "decrease_intensity_on_contact": true, // Decrease the field intensity by one each time a character walk on it.