--- a/net/minecraft/server/level/ServerLevel.java
+++ b/net/minecraft/server/level/ServerLevel.java
@@ -934,9 +_,18 @@
                     && this.random.nextDouble() < currentDifficultyAt.getEffectiveDifficulty() * this.paperConfig().entities.spawning.skeletonHorseThunderSpawnChance.or(0.01) // Paper - Configurable spawn chances for skeleton horses
                     && !this.getBlockState(blockPos.below()).is(Blocks.LIGHTNING_ROD);
                 if (flag) {
+                    // Purpur start - Special mobs naturally spawn
+                    net.minecraft.world.entity.animal.horse.AbstractHorse entityhorseskeleton;
+                    if (purpurConfig.zombieHorseSpawnChance > 0D && random.nextDouble() <= purpurConfig.zombieHorseSpawnChance) {
+                        entityhorseskeleton = EntityType.ZOMBIE_HORSE.create(this, EntitySpawnReason.EVENT);
+                    } else {
+                        entityhorseskeleton = EntityType.SKELETON_HORSE.create(this, EntitySpawnReason.EVENT);
+                        if (entityhorseskeleton != null) ((SkeletonHorse) entityhorseskeleton).setTrap(true);
+                    }
+                    // Purpur end - Special mobs naturally spawn
                     SkeletonHorse skeletonHorse = EntityType.SKELETON_HORSE.create(this, EntitySpawnReason.EVENT);
                     if (skeletonHorse != null) {
-                        skeletonHorse.setTrap(true);
+                        //skeletonHorse.setTrap(true); // Purpur - Special mobs naturally spawn - moved up
                         skeletonHorse.setAge(0);
                         skeletonHorse.setPos(blockPos.getX(), blockPos.getY(), blockPos.getZ());
                         this.addFreshEntity(skeletonHorse, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.LIGHTNING); // CraftBukkit