"And I assure you, your son has little trouble with simple spells!"
He says that some of the simpler spells actually hold better in gold.
"You seek to drive me forth with such a simple spell?"
All that's involved is a simple spell or two.
Even this simple spell would tax him to the limit.
One simple spell was not going to do any harm.
It was the simplest spell I knew; almost the only one, in fact.
It was, at the bottom, a very simple spell, so what could possibly go wrong?
"Let me teach you a very simple spell for healing."
He'd hoped for simple spells; he had not expected anything like this.