--- a/net/minecraft/world/level/block/SculkSpreader.java
+++ b/net/minecraft/world/level/block/SculkSpreader.java
@@ -35,6 +35,14 @@
 import net.minecraft.world.level.GeneratorAccess;
 import net.minecraft.world.level.block.state.IBlockData;
 
+// CraftBukkit start
+import net.minecraft.nbt.NBTBase;
+import net.minecraft.world.level.World;
+import org.bukkit.Bukkit;
+import org.bukkit.craftbukkit.block.CraftBlock;
+import org.bukkit.event.block.SculkBloomEvent;
+// CraftBukkit end
+
 public class SculkSpreader {
 
     public static final int MAX_GROWTH_RATE_RADIUS = 24;
@@ -50,6 +58,7 @@
     private final int chargeDecayRate;
     private final int additionalDecayRate;
     private List<SculkSpreader.a> cursors = new ArrayList();
+    public World level; // CraftBukkit
 
     public SculkSpreader(boolean flag, TagKey<Block> tagkey, int i, int j, int k, int l) {
         this.isWorldGeneration = flag;
@@ -103,7 +112,7 @@
 
     public void load(NBTTagCompound nbttagcompound) {
         this.cursors.clear();
-        ((List) nbttagcompound.read("cursors", SculkSpreader.a.CODEC.sizeLimitedListOf(32)).orElse(List.of())).forEach(this::addCursor);
+        (nbttagcompound.read("cursors", SculkSpreader.a.CODEC.sizeLimitedListOf(32)).orElse(List.of())).forEach(this::addCursor); // CraftBukkit - decompile error
     }
 
     public void save(NBTTagCompound nbttagcompound) {
@@ -122,6 +131,19 @@
 
     private void addCursor(SculkSpreader.a sculkspreader_a) {
         if (this.cursors.size() < 32) {
+            // CraftBukkit start
+            if (!isWorldGeneration()) { // CraftBukkit - SPIGOT-7475: Don't call event during world generation
+                CraftBlock bukkitBlock = CraftBlock.at(level, sculkspreader_a.pos);
+                SculkBloomEvent event = new SculkBloomEvent(bukkitBlock, sculkspreader_a.getCharge());
+                Bukkit.getPluginManager().callEvent(event);
+                if (event.isCancelled()) {
+                    return;
+                }
+
+                sculkspreader_a.charge = event.getCharge();
+            }
+            // CraftBukkit end
+
             this.cursors.add(sculkspreader_a);
         }
     }
@@ -214,7 +236,7 @@
             this.charge = i;
             this.decayDelay = j;
             this.updateDelay = k;
-            this.facings = (Set) optional.orElse((Object) null);
+            this.facings = (Set) optional.orElse(null); // CraftBukkit - decompile error
         }
 
         public a(BlockPosition blockposition, int i) {