@Override
  public boolean invoke(MOB mob, Vector commands, Physical givenTarget, boolean auto, int asLevel) {

    if ((auto || mob.isMonster())
        && ((commands.size() < 1) || (((String) commands.firstElement()).equals(mob.name())))) {
      commands.clear();
      if (mob.numItems() > 0) commands.addElement(mob.getRandomItem());
      commands.addElement(CMLib.map().getRandomArea().Name());
    }
    final Room oldRoom = mob.location();
    if (commands.size() < 2) {
      mob.tell(L("Teleport what object to what place or person?"));
      return false;
    }
    final String objectName = (String) commands.firstElement();
    final Item target = mob.findItem(null, objectName);
    if (target == null) {
      mob.tell(L("You don't seem to have an item '@x1'.", objectName));
      return false;
    }
    if (target.amWearingAt(Wearable.IN_INVENTORY)) {
      mob.tell(L("You seem to be wearing or holding the item '@x1'.", objectName));
      return false;
    }
    String searchWhat = null;
    if (commands.size() > 2) {
      final String s = (String) commands.elementAt(1);
      if (s.equalsIgnoreCase("room")) searchWhat = "R";
      if (s.equalsIgnoreCase("area")) searchWhat = "E";
      if (s.equalsIgnoreCase("mob")) searchWhat = "M";
      if (s.equalsIgnoreCase("monster")) searchWhat = "M";
      if (s.equalsIgnoreCase("player")) searchWhat = "P";
      if (s.equalsIgnoreCase("user")) searchWhat = "P";
      if (s.equalsIgnoreCase("item")) searchWhat = "I";
      if (s.equalsIgnoreCase("object")) searchWhat = "I";
      if (searchWhat != null) commands.removeElementAt(1);
    }
    if (searchWhat == null) searchWhat = "ERIPM";
    final String destinationString = CMParms.combine(commands, 1).trim().toUpperCase();
    final List<Room> candidates =
        CMLib.map().findWorldRoomsLiberally(mob, destinationString, searchWhat, 10, 600000);
    if (candidates.size() == 0) {
      mob.tell(L("You don't know of a place called '@x1'.", destinationString.toLowerCase()));
      return false;
    }

    if (CMLib.flags().isSitting(mob) || CMLib.flags().isSleeping(mob)) {
      mob.tell(L("You need to stand up!"));
      return false;
    }

    Room newRoom = null;
    int tries = 0;
    while ((tries < 20) && (newRoom == null)) {
      newRoom = candidates.get(CMLib.dice().roll(1, candidates.size(), -1));
      if (((newRoom.roomID().length() == 0) && (CMLib.dice().rollPercentage() > 50))
          || ((newRoom.domainType() == Room.DOMAIN_OUTDOORS_AIR)
              && (CMLib.dice().rollPercentage() > 10))) {
        newRoom = null;
        continue;
      }
      final CMMsg enterMsg =
          CMClass.getMsg(
              mob,
              newRoom,
              null,
              CMMsg.MSG_ENTER,
              null,
              CMMsg.MSG_ENTER,
              null,
              CMMsg.MSG_ENTER,
              null);
      if (!newRoom.okMessage(mob, enterMsg)) newRoom = null;
      tries++;
    }

    if ((newRoom == null) || (newRoom == oldRoom)) {
      mob.tell(L("Your magic seems unable to send anything there."));
      return false;
    }

    if (!super.invoke(mob, commands, givenTarget, auto, asLevel)) return false;

    boolean success = proficiencyCheck(mob, 0, auto);

    final CMMsg msg =
        CMClass.getMsg(
            mob,
            target,
            this,
            somanticCastCode(mob, target, auto),
            L("^S<S-NAME> invoke(s) a teleportation spell upon <T-NAME>.^?"));
    if (oldRoom.okMessage(mob, msg)) {
      oldRoom.send(mob, msg);
      newRoom.bringMobHere(mob, false);
      target.unWear();
      success = CMLib.commands().postDrop(mob, target, true, false, false) && (!mob.isMine(target));
      oldRoom.bringMobHere(mob, false);
      if (success) {
        oldRoom.show(mob, target, null, CMMsg.MSG_OK_VISUAL, L("<T-NAME> vanishes!"));
        newRoom.showOthers(
            mob, target, null, CMMsg.MSG_OK_VISUAL, L("<T-NAME> appear(s) out of nowhere!"));
      } else mob.tell(L("Nothing happens."));
    }
    // return whether it worked
    return success;
  }