@Override
	public boolean invoke(MOB mob, List<String> commands, Physical givenTarget, boolean auto, int asLevel)
	{

		final int type=mob.location().domainType();
		if(((type&Room.INDOORS)>0)
			||(type==Room.DOMAIN_OUTDOORS_AIR)
			||(type==Room.DOMAIN_OUTDOORS_CITY)
			||(type==Room.DOMAIN_OUTDOORS_SPACEPORT)
			||(CMLib.flags().isWateryRoom(mob.location())))
		{
			mob.tell(L("That magic won't work here."));
			return false;
		}
		if(!super.invoke(mob,commands,givenTarget,auto,asLevel))
			return false;

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

		if(success)
		{
			final CMMsg msg=CMClass.getMsg(mob,mob.location(),this,verbalCastCode(mob,mob.location(),auto),auto?"":L("^S<S-NAME> @x1.^?",prayWord(mob)));
			if(mob.location().okMessage(mob,msg))
			{
				mob.location().send(mob,msg);
				mob.location().showHappens(CMMsg.MSG_OK_VISUAL,L("The ground here turns to MUD!"));
				beneficialAffect(mob,mob.location(),asLevel,0);
			}
		}
		else
			beneficialWordsFizzle(mob,null,L("<S-NAME> @x1, but nothing happens.",prayWord(mob)));


		// return whether it worked
		return success;
	}