Time to give it a try. Mo pointed his wand at his goblet and drew a circle around the rim of the goblet a few times, just to get a feel for the circumference of the glass without having to look. If he was going to create an image in his head, he didn't want to be distracted by those around him. Mo closed his eyes and started the circle, "Sent-."

Splash.

Oops! Mo peeked, noting that his wand was now dripping a bit on the desk. Maybe he'd just point the wand a little higher and avoid drenching his wand, his desk, and himself. Closing his eyes and wrinkling up his face, Mo drew the circle again, this time imagining a snowy mountain and a brisk wind, and the still dark home of a yeti. What would it smell like? What if had fur too? Would it be soft and warm, or would it be frozen with packed snow? It was his daydream, right?

"Sentio Somnium. Sentio Somnium." Mo tried to create as real a scene as possible before lowering his wand and opening his eyes again. Did it work?