Then if he is to profit nothing from all this, let the next devil after him profit little more. He cannot tell Sevar outright; for of which things are forbidden to speak and to who, it is also forbidden to speak; but at suitable levels of abstraction over the secrets of secrets, it becomes permissible to hint.
"To answer your question fully is something that is forbidden," he tells then the Grand High Priestess. "But Sevar and her ilk, it is thought in Dis, may prove unusually apt for training petitioners or even lesser devils."
To be asked more than one such question is below the pride of Hell even for a Grand High Priestess, and so he now turns upon his heel and departs empty-handed. At best there may be some apportion of favor for the contract he wrote for Sevar, if it ever bears its own fruit.