Hope this isn't a spoiler, I removed the name just in case -

DudeMcDuder points at the sheet of lead, "Cast Energy Bolt at that, minimum coherency."
Moments later, you have sent a beam of transparent, green-blue light dead center into the lead sheet. DudeMcDuder nods approvingly toward you and says, "Interesting. Sure, I can teach you to prepare your spells like a Ranger. If you have a few anlean to kill, let me know."
[Ask DudeMcDuder about PREPARE or PREPARATION again in the next 30 seconds to learn the Life spell preparation as a special preparation technique (see PREPARE /HELP for more information).]

What a stunning ability to let me cast a spell I can no longer cast!