"I, Hermione Granger, bind thee, Imp Colley, to my service," she intoned ritually, and a faintly shimmering heat haze of magic rose from the circumference of the circle. "I demand thy loyalty and servitude, and offer my protection and care. Thou shalt keep my secrets and do my will, and in return I shall nourish thee with my magic. Dost thou agree to the terms of this oath, Imp Colley?"