좀비 소환

    @EventHandler
    public void onPlaceZombieBlock(BlockPlaceEvent event) {
        Player player = event.getPlayer();
        ItemStack item = event.getItemInHand();

        if (item.getType() == Material.DIAMOND_BLOCK && item.hasItemMeta()) {
            ItemMeta meta = item.getItemMeta();
            if (meta != null && "Zombie".equals(ChatColor.stripColor(meta.getDisplayName()))) {

                // Normalize location manually
                Block placedBlock = event.getBlockPlaced();
                Location blockLoc = new Location(
                    placedBlock.getWorld(),
                    placedBlock.getX(),
                    placedBlock.getY(),
                    placedBlock.getZ()
                );
                Location spawnLoc = blockLoc.clone().add(0.5, 1, 0.5);

                Zombie zombie = (Zombie) spawnLoc.getWorld().spawnEntity(spawnLoc, EntityType.ZOMBIE);
                zombie.setCustomName("Block Guardian");
                zombie.setCustomNameVisible(true);
                zombie.setPersistent(true);
                zombie.setAdult();
                zombie.setCanPickupItems(true);
                zombie.setRemoveWhenFarAway(false);
                zombie.setMetadata("owner", new FixedMetadataValue(this, player.getUniqueId().toString()));
                guardianZombies.put(blockLoc, zombie);

                // Restore saved gear
                ItemStack[] gear = latestZombieGear;
                if (gear != null) {
                    EntityEquipment eq = zombie.getEquipment();
                    if (eq != null) {
                        if (gear[0] != null) eq.setItemInMainHand(gear[0]);
                        if (gear[1] != null) eq.setHelmet(gear[1]);
                        if (gear[2] != null) eq.setChestplate(gear[2]);
                        if (gear[3] != null) eq.setLeggings(gear[3]);
                        if (gear[4] != null) eq.setBoots(gear[4]);

                        eq.setItemInMainHandDropChance(0f);
                        eq.setHelmetDropChance(0f);
                        eq.setChestplateDropChance(0f);
                        eq.setLeggingsDropChance(0f);
                        eq.setBootsDropChance(0f);
                    }
                }

                player.sendMessage(ChatColor.GREEN + "Guardian summoned.");
            }
        }
    }

    @EventHandler
    public void onBreakZombieBlock(BlockBreakEvent event) {
        Block block = event.getBlock();
        Location loc = new Location(block.getWorld(), block.getX(), block.getY(), block.getZ());

        if (block.getType() == Material.DIAMOND_BLOCK && guardianZombies.containsKey(loc)) {
            event.setDropItems(false);
            event.setExpToDrop(0);

            // Drop the named diamond block
            ItemStack drop = new ItemStack(Material.DIAMOND_BLOCK);
            ItemMeta meta = drop.getItemMeta();
            if (meta != null) {
                meta.setDisplayName(ChatColor.GREEN + "Zombie");
                meta.setLore(Collections.singletonList(ChatColor.GRAY + "Summons your guardian"));
                drop.setItemMeta(meta);
            }
            block.getWorld().dropItemNaturally(loc, drop);

            // Save zombie gear
            Zombie z = guardianZombies.remove(loc);
            if (z != null && !z.isDead()) {
                EntityEquipment eq = z.getEquipment();
                if (eq != null) {
                    ItemStack[] gear = new ItemStack[5];
                    gear[0] = eq.getItemInMainHand();
                    gear[1] = eq.getHelmet();
                    gear[2] = eq.getChestplate();
                    gear[3] = eq.getLeggings();
                    gear[4] = eq.getBoots();
                    latestZombieGear = gear;
                }
                z.remove();
            }

            event.getPlayer().sendMessage(ChatColor.RED + "Guardian vanished. Gear stored.");
        }
    }