@Override
    protected void onDamage(final int level, final LivingEntity damager, final EntityDamageByEntityEvent event) {
        if (!(damager instanceof Player))
            return;

        final Entity victim = event.getEntity();

        new BukkitRunnable() {

            private int remainingSeconds = 25;
            private final Map<Location, Material> oldBlocks = new HashMap<>();

            @Override
            public void run() {
                remainingSeconds--;

                for (final Block block : getBlocksInRadius(victim.getLocation(), 4)) {
                    if (block.getType() != Material.ICE) {
                        oldBlocks.put(block.getLocation(), block.getType());
                        block.setType(Material.ICE);
                    }
                }

                if (remainingSeconds == 0) {
                    this.cancel();

                    for (final Map.Entry<Location, Material> entry : oldBlocks.entrySet()) {
                        entry.getKey().getBlock().setType(entry.getValue());
                    }
                }
            }
        }.runTaskTimer(SimplePlugin.getInstance(), 0, 6);
    }