@Override
	public boolean invoke(MOB mob, List<String> commands, Physical givenTarget, boolean auto, int asLevel)
	{
		final MOB target=this.getTarget(mob,commands,givenTarget);
		if(target==null)
			return false;

		int levelDiff=target.phyStats().level()-(mob.phyStats().level()+(2*getXLEVELLevel(mob)));
		if(levelDiff<0)
			levelDiff=0;
		if(!super.invoke(mob,commands,givenTarget,auto,asLevel))
			return false;


		boolean success=proficiencyCheck(mob,-(levelDiff*2),auto);

		if(success)
		{
			invoker=mob;
			final CMMsg msg=CMClass.getMsg(mob,target,this,verbalCastCode(mob,target,auto),auto?"":L("^S<S-NAME> chant(s) at <T-NAMESELF>.^?"));
			if(mob.location().okMessage(mob,msg))
			{
				mob.location().send(mob,msg);
				if(msg.value()<=0)
				{
					success=maliciousAffect(mob,target,asLevel,-levelDiff,-1)!=null;
					if(success)
						if(target.location()==mob.location())
							target.location().show(target,null,CMMsg.MSG_OK_ACTION,L("<S-NAME> become(s) surrounded by a powerful magnetic field!!"));
				}
			}
		}
		else
			return maliciousFizzle(mob,target,L("<S-NAME> chant(s) to <T-NAMESELF>, but the spell fades."));

		// return whether it worked
		return success;
	}