@Override
	public boolean invoke(MOB mob, Vector commands, Physical givenTarget, boolean auto, int asLevel)
	{
		if((mob.numFollowers()>0)||(mob.isMonster()))
		{
			mob.tell(_("You cannot have any followers when casting this spell."));
			return false;
		}

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

		final int experienceToLose=getXPCOSTAdjustment(mob,100);
		CMLib.leveler().postExperience(mob,null,null,-experienceToLose,false);
		mob.tell(_("The effort causes you to lose @x1 experience.",""+experienceToLose));

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

		if(success)
		{
			invoker=mob;
			final CMMsg msg=CMClass.getMsg(mob,null,this,verbalCastCode(mob,null,auto),auto?"":_("^S<S-NAME> call(s) for a familiar.^?"));
			if(mob.location().okMessage(mob,msg))
			{
				mob.location().send(mob,msg);
				final MOB target = determineMonster(mob, mob.phyStats().level());
				if(target.isInCombat()) target.makePeace();
				CMLib.commands().postFollow(target,mob,true);
				invoker=mob;
				if(target.amFollowing()!=mob)
					mob.tell(_("@x1 seems unwilling to follow you.",target.name(mob)));
			}
		}
		else
			return beneficialWordsFizzle(mob,null,_("<S-NAME> call(s), but choke(s) on the words."));

		// return whether it worked
		return success;
	}