“The aru’lis would need to enter the vessel at the very moment the soul leaves their body. One moment too soon, and you’d have a situation where two souls would be in one body. And no one wants that again,” he said, muttering the last part. Again? “The vessel would need to possess, at the very least, similar embers—the essence—as those carried within the aru’sòl,” he said. “I don’t know if it has ever been attempted or successful.”