@EventHandler
    public void onPlayerKilled(PlayerDeathEvent event) {
        if (event.getEntity().getKiller() != null) {
            String prefix = ChatColor.RED + "[KB] ";
            @SuppressWarnings("unchecked")
            List<Integer> ks = (List<Integer>) getConfig().getList("killstreaks");
            String message;
            String killstreakstring;

            String killer = event.getEntity().getKiller().getDisplayName();
            String killed = event.getEntity().getDisplayName();

            killstreaks.put(killed, 4);

            Player killerplayer = event.getEntity().getKiller();
            Player killedplayer = event.getEntity();

            boolean usexpbar = getConfig().getBoolean("usexpbar");
            if (killerplayer.hasPermission("killstreak.use")) {
                int oldkillstreak = killstreaks.get(killed);
                killstreaks.put(killed, 0);

                int smallest = 0;
                if (ks != null) {
                    smallest = ks.get(0);
                    for (int killstreak : ks) {
                        if (smallest > killstreak) {
                            smallest = killstreak;
                        }
                    }
                    if (smallest != 0){
                        if (oldkillstreak >= smallest) {
                            killstreakstring = String.valueOf(oldkillstreak);
                            message = prefix + getConfig().getString("messagekillstreakbroken");
                            message = ChatColor.translateAlternateColorCodes('&', message);
                            message = message.replaceAll("-playerbreaker-", killer);
                            message = message.replaceAll("-playerbroken-", killed);
                            message = message.replaceAll("-killstreak-", killstreakstring);
                            Bukkit.broadcastMessage(message);
                        }
                    }
                }

                int current = killstreaks.get(killer);
                current ++;
                killstreaks.put(killer, current);

                if (usexpbar) {
                    killedplayer.setExp(0);
                    killedplayer.setLevel(0);
                    killerplayer.setExp(0);
                    killerplayer.setLevel(current);
                }

                if (ks.contains(current)) {
                    killstreakstring = String.valueOf(current);
                    message = prefix + getConfig().getString("messagenewkillstreak");
                    message = ChatColor.translateAlternateColorCodes('&', message);
                    message = message.replaceAll("-player-", killer);
                    message = message.replaceAll("-killstreak-", killstreakstring);
                    Bukkit.broadcastMessage(message);

                }
            }
        }
    }