As you speak the magic words, the tome bursts into energy, granting your body and mind the knowledge of a new spell.

You use Tome of Dispel Strike, and learn Dispel Strike!

Moonflower: "Whoa! Was that s'posed to happen?"

Moondancer: "Yeah, although I've never seen somepony else do it. It looked... pretty silly, actually. Anyway, if that's all you needed, I have some studying to catch up on."