“I’ve gotten my Phosphor to work at last.” Henry proudly brandished the object. “It functions on the principle of witchlight but is five times more powerful. Merely press a button, and you will see a blaze of light the like of which you have never imagined.”There was a silence. “So,” said Will finally, “it’s a very, very bright witchlight, then?”“Exactly,” Henry said.“Is that useful, precisely?” Jem inquired. “After all, witchlight is just for illumination. It’s not as if it’s dangerous… .”“Wait till you see it!” Henry replied. He held up the object. “Watch.”Will moved to object, but it was too late; Henry had already pressed the button. There was a blinding flare of light and a whooshing sound, and the room was plunged into blackness. Tessa gave a yelp of surprise, and Jem laughed softly.“Am I blind?” Will’s voice floated out of the darkness, tinged with annoyance. “I’m not going to be at all pleased if you’ve blinded me, Henry.”“No.” Henry sounded worried. “No, the Phosphor seems to— Well, it seems to have turned all the lights in the room off.”“It’s not supposed to do that?” Jem sounded mild, as always.“Er,” said Henry, “no.”

“Will moved to object, but it was too late; Henry had already pressed the button. There was a blinding flare of light and a whooshing sound, and the room was plunged into blackness. Tessa gave a yelp of surprise, and Jem laughed softly."Am I blind?" Will's voice floated out of the darkness, tinged with annoyance. "I'm not going to be at all pleased if you've blinded me, Henry.”

“Am I blind?" Will's voice floated out of the darkness, tinged with annoyance. "I'm not going to be at all pleased if you've blinded me, Henry.”

“I'm not going to be at all pleased if you've blinded me, Henry.”

“Henry turned as if to dart out of the room, then swung around and stared at them, a look of confusion passing over his freckled face, as if he had only now had cause to wonder why Will, Tessa, and Jem might be crouching together in a mostly disused storage room. "What are you three doing in here, anyway?"Will tilted his head to the side and smiled at Henry. "Charades," he said. "Massive game.”

“And in addition to its practical uses, it would seem to work for cosmetic purposes. This powder would make my very skin glimmer for eternity."Henry frowned. "Not eternity," he said, but then he brightened. "But I could make you up another batch whenever you please!""I could shine at will!" Magnus grinned at Henry.”

“Will pointed a finger accusingly in their direction. "You're ganging up on me. Is this how it's going to be from now on? I'll be the odd man out? Dear God, I'll have to befriend Jessamine.""Jessamine can't stand you," Jem pointed out."Henry, then.""Henry will set you on fire.”