Time

"Good, you've understood the procedure." The doctor nodded as Rui explained the procedure perfectly. "Have you made sure to satisfy the conditions for being viable for the procedure? Have you consumed alcohol in the past week?"

"No, I haven't." Rui confirmed.

"Have you consumed psychedelic drugs in the past forty days?" The doctor asked.

"Not at all."

"Did you get two nights of natural normal sleep without having consumed any mental rejuvenation potions?"

"I did." Rui assured.