She drew herself up and reached into the Charter. There, in the endless flow, she drew out all the marks she knew for breaking and blasting, for fire and destruction, for blocking, barring, and locking. They came into her mind in a flood, brighter and more blinding than any light, so strong that she could barely weave them into a spell. But somehow she ordered them as she wished, and linked them together with a single master mark, one of great power, that she had never before dared to use.
With the spell ready, pent up inside her by will alone, Lirael did the bravest thing she had ever done. She touched the door with one hand, the creature's hook with the other, and spoke the master Charter mark to cast the spell.
As she spoke, heat coursed through Lirael's throat. White fire exploded through her right hand into the creature, and a titanic force was unleashed from her left, slamming the door shut. She was hurled backwards, tumbling over and over till her head struck the stone floor with a terrible crack that sent her instantly into darkness.

Lirael, Ch. 7-8, pg. 69-71