A Wizard of Earthsea
The boy could not speak, but he laughed.
Then his aunt was a little afraid of his strength, for this was as strong a spell as she knew how to weave. (1.16-7)
For he hungered to learn, to gain power (2.16)
With voice and hand he made the Opening spell which his aunt had taught him long ago; it was the prize among all her stock of spells, and he wove it well now. But it was only a witch's charm, and the power that held this doorway was not moved at all. (3.6)