@Override
    public void onDeath(final Creature self, final Creature killer) {
      if (self.isNpc() && (self.getId() == NOKTUM)) {
        self.broadcastPacketToOthers(
            new ExShowScreenMessage(
                NpcString.GHOST_OF_HARNAK_CAN_ONLY_BE_HIT_NEAR_SOUL_CIRCLE,
                5000,
                ExShowScreenMessage.ScreenMessageAlign.BOTTOM_CENTER,
                true,
                ExShowScreenMessage.STRING_TYPE,
                0,
                false,
                0));
        self.removeListener(_deathListener);
      }

      if (self.isNpc() && (self.getId() == DEMONIC_NOKTUM)) {
        self.broadcastPacketToOthers(
            new ExShowScreenMessage(
                NpcString.GHOST_OF_HARNAK_CAN_ONLY_BE_HIT_NEAR_SOUL_CIRCLE,
                5000,
                ExShowScreenMessage.ScreenMessageAlign.BOTTOM_CENTER,
                true,
                ExShowScreenMessage.STRING_TYPE,
                0,
                false,
                0));
        self.removeListener(_deathListener);
      }
    }