Nudge, nudge, wink, wink

"What do you mean you haven't left a prompt yet? I expected better from a Gryffindor!"

Promptly, now!

"Yes, Minerva, I remember our wager," Snape said through clenched teeth. "If every one of my House does not leave a prompt for your fest, I will allow you to Transfigure me into --" his voice grew, if it were possible, even more icy, "-- a fluffy bunny." Minerva suppressed a smile. "But I hope," he added pointedly, "you recall what my prize is to be if I win..."