Pyromancy 2

And for lack of anything else to do, Jace finally turned to Baltrice and asked, "So how is it you know your way around Kamigawa, anyway?"

"Been here before," Baltrice explained. She stretched her hand over a small pile of wood and tinder, and tensed her arm as though lifting a heavy weight. Sparks rained from beneath her fingernails, and soon they had a small but cheerful campfire dancing merrily away. "Helped Tezzeret establish the Kamigawa cell, until we found local people to lead it. Spent several months here."

Agents of Artifice (Magic The Gathering: Planeswalker Book 1), Chapter 13