[the fireflies gather around his wing! and he may feel a tingling sensation traveling all the way up it and to his beak]

[then the fireflies disperse, and he's holding. . . several small, glass jars]

Y-you'll need to put the ingredients in here, um. To keep them fresh. And I'll need you to collect. . . um! Five pieces of a human: a lock of hair, a clipping of toenail, a drop of tears, a single eyelash, and a puff of breath. Um, all of those t-things must come from five different people.

Bring them to me when you're finished, a-and I'll whip up the spell.