[ Matt is a very mature and experienced spellcaster, so he sticks his tongue out at Koby at the mention of drowning. He tastes bonfire on the tip of his tongue, but it's worth it.

He recognizes the look on Koby's face, though, and his expression softens. Back to business. ]

Borrow or generate could both be accurate, depending on the spell. Some spellcasters actually borrow most of their power, the way I understand it? Like by making deals. For me, if I spill some of my blood and a god or spirit or the universe gives me power in return, you could consider that "borrowing energy," or maybe purchasing it. Or you could think of it as my blood creating the energy necessary to get the effect. Sometimes I just ask, and the universe seems to feel like indulging me.

To generate power, spellcasters might harness their emotions, force of will, their bodies. When you get down into the details, there's probably as many different ways to do it as there are witches, but those are some of the big categories.

What have you been working on exactly? [ Matt adds, as he recalls the whole reason Koby started down this path. ] You said "extrasensory"?