It's an order of torment, to be taken at some point during the next week. Exactly as bad as the most severe punishment Asmodia would've had during her time in Ostenso, which Maillol has looked up, before this; because he doesn't want to break Asmodia, but he guessed that this point in time would come.
"Don't get this taken any time you need to do something important the next day, or anything at all in the next few hours," Maillol says, because you would not think adults could need to be told this, but Carissa Sevar has expanded his grasp of the possible.