The unicorn in question is drinking from a small forest spring when she finds him. His fur is blue-black, with three pale golden socks, and his hooves and horn are pearly white.

"Hi!" he says. "You're Isibel, r—I mean, you must be Isibel, I can tell." He straightens up and nods importantly, flicking his tail. "The Wild Magic sent me! I have to tell you that you need to bond with a dragon to save the world."