Terry Pratchett. The Colour Of Magic (№ 264030)

Quote Explanation: Before that was followed by this text: "Rincewind somehow raised himself on his elbows and dipped his hand into the pocket of the hoodie. When he pulled out of her, on his palm sat a green frog. Eyes of amphibians strangely gleamed in the twilight. You? 'said Rincewind. "Put me down on the floor and step back". The frog blinked. The wizard obeyed, and at the same time, dragged away from sin stunned dacoda. The room went dark. Sounded like a howling wind sound. Out of nowhere, appeared a strip of green, purple and oktarinovy fog. They began to spin in spirals, fast approaching spread-eagled on the floor amphibians and scattering around the tiny zipper. The frog disappeared in a Golden haze. The fog gradually spread upwards filling the room with warm yellow light. Through the haze stood out the outlines of dark shapes that waved and changed right before our eyes. High, the maddening hum of powerful magic field is not stopped..."