There are two ways Lawrence can use his power. He can give a command with a set time, and the entity will try to fulfill it as best it can within that set time. He pays the cost upfront. But if the time is too short, it will break before the task is finished; and if it's too long, he wastes backlash. He has the option of giving the command with no time limit, producing backlash at a set rate until the task is finished, but the cost will always be more than if he did it with a set time. Though he has the option of aborting the command early.
He should probably have practiced this maneuver on an easier monster first. Oh well.
At the lowest point of Mx. Fluffy Cheese Cracker's dive, he commands it. Go into the cage.
He gives the command with no time limit, but he'll abort if it takes more than ten seconds. Hopefully it will take five or less.