@Override
	public boolean okMessage(final Environmental myHost, final CMMsg msg)
	{
		if(!(affected instanceof MOB))
			return true;

		if((thePlants==null)||(thePlants.owner()==null)||(!(thePlants.owner() instanceof Room)))
		{
			unInvoke();
			return super.okMessage(myHost,msg);
		}

		final MOB mob=(MOB)affected;

		// when this spell is on a MOBs Affected list,
		// it should consistantly prevent the mob
		// from trying to do ANYTHING except sleep
		if(msg.amISource(mob))
		{
			if((!msg.sourceMajor(CMMsg.MASK_ALWAYS))
			&&((msg.sourceMajor(CMMsg.MASK_HANDS))
			||(msg.sourceMajor(CMMsg.MASK_MOVE))))
			{
				mob.location().show(mob,null,thePlants,CMMsg.MSG_OK_ACTION,_("<S-NAME> struggle(s) against <O-NAME>."));
				amountRemaining-=(mob.charStats().getStat(CharStats.STAT_STRENGTH)*4);
				if(amountRemaining<0)
					unInvoke();
				else
					return false;
			}
		}
		return super.okMessage(myHost,msg);
	}