That look that Severus had been studying before was gone. That smugness. Now he just looked -- He hated to admit it, but it was true. Remus looked how Severus so often felt. The slytherin sighed, inhaling for a long moment before he started to bottle the draught. He gave one to Remus, tucking it into his bag for him. The rest he kept for himself.

"I want to practice," Severus blurted out. "Patronus and..." Well, he couldn't just say it out loud here. Slughorn might have had little devices lurking around trying to catch intrigue or bits of genius. "Can you come tonight? My place. The one I showed you."