Added recipe for Nether Crystal Blocks, tweaked cattail textures

src/main/java/biomesoplenty/common/biome/nether/UndergardenBiome.java

@@ -62,6 +62,7 @@ public class UndergardenBiome extends NetherBiomeBOP
         //Entities
         this.addSpawn(EntityClassification.MONSTER, new SpawnListEntry(EntityType.GHAST, 50, 4, 4));
         this.addSpawn(EntityClassification.MONSTER, new SpawnListEntry(EntityType.MAGMA_CUBE, 2, 4, 4));
+        this.addSpawn(EntityClassification.MONSTER, new Biome.SpawnListEntry(EntityType.HOGLIN, 9, 3, 4));
         this.addSpawn(EntityClassification.CREATURE, new SpawnListEntry(EntityType.STRIDER, 60, 1, 2));
 
         this.addWeight(BOPClimates.NETHER, 10);

src/main/java/biomesoplenty/common/biome/nether/VisceralHeapBiome.java

@@ -10,6 +10,7 @@ import net.minecraft.client.audio.BackgroundMusicTracks;
 import net.minecraft.entity.EntityClassification;
 import net.minecraft.entity.EntityType;
 import net.minecraft.fluid.Fluids;
+import net.minecraft.particles.ParticleTypes;
 import net.minecraft.util.SoundEvents;
 import net.minecraft.world.biome.*;
 import net.minecraft.world.gen.GenerationStage;

src/main/resources/data/biomesoplenty/advancements/recipes/building_blocks/nether_crystal_block.json

@@ -0,0 +1,32 @@
+{
+  "parent": "minecraft:recipes/root",
+  "rewards": {
+    "recipes": [
+      "biomesoplenty:nether_crystal_block"
+    ]
+  },
+  "criteria": {
+    "has_nether_crystal": {
+      "trigger": "minecraft:inventory_changed",
+      "conditions": {
+        "items": [
+          {
+            "item": "biomesoplenty:nether_crystal"
+          }
+        ]
+      }
+    },
+    "has_the_recipe": {
+      "trigger": "minecraft:recipe_unlocked",
+      "conditions": {
+        "recipe": "biomesoplenty:nether_crystal_block"
+      }
+    }
+  },
+  "requirements": [
+    [
+      "has_nether_crystal",
+      "has_the_recipe"
+    ]
+  ]
+}

src/main/resources/data/biomesoplenty/loot_tables/blocks/nether_crystal_block.json

@@ -4,14 +4,61 @@
     {
       "rolls": 1,
       "entries": [
+        {
+          "type": "minecraft:alternatives",
+          "children": [
             {
               "type": "minecraft:item",
-          "name": "biomesoplenty:nether_crystal_block"
-        }
-      ],
               "conditions": [
                 {
-          "condition": "minecraft:survives_explosion"
+                  "condition": "minecraft:match_tool",
+                  "predicate": {
+                    "enchantments": [
+                      {
+                        "enchantment": "minecraft:silk_touch",
+                        "levels": {
+                          "min": 1
+                        }
+                      }
+                    ]
+                  }
+                }
+              ],
+              "name": "biomesoplenty:nether_crystal_block"
+            },
+            {
+              "type": "minecraft:item",
+              "functions": [
+                {
+                  "function": "minecraft:set_count",
+                  "count": {
+                    "min": 2.0,
+                    "max": 4.0,
+                    "type": "minecraft:uniform"
+                  }
+                },
+                {
+                  "function": "minecraft:apply_bonus",
+                  "enchantment": "minecraft:fortune",
+                  "formula": "minecraft:uniform_bonus_count",
+                  "parameters": {
+                    "bonusMultiplier": 1
+                  }
+                },
+                {
+                  "function": "minecraft:limit_count",
+                  "limit": {
+                    "max": 4,
+                    "min": 1
+                  }
+                },
+                {
+                  "function": "minecraft:explosion_decay"
+                }
+              ],
+              "name": "biomesoplenty:nether_crystal"
+            }
+          ]
         }
       ]
     }

src/main/resources/data/biomesoplenty/recipes/nether_crystal_block.json

@@ -0,0 +1,15 @@
+{
+  "type": "minecraft:crafting_shaped",
+  "pattern": [
+    "##",
+    "##"
+  ],
+  "key": {
+    "#": {
+      "item": "biomesoplenty:nether_crystal"
+    }
+  },
+  "result": {
+    "item": "biomesoplenty:nether_crystal_block"
+  }
+}