This power was not so easy to master. Yinsen had long been mentally prepared, so he was in no hurry. He even had the leisure to study other things each day, occasionally guiding Snape in brewing potions—Snape had already begun treating himself as an apprentice, without the slightest dissatisfaction.
Dumbledore knew about this, but being able to learn more advanced knowledge was naturally a good thing for a wizard.
Besides, no one trusted Snape more than he did, and Snape growing stronger meant their side would grow stronger as well.
Dumbledore quietly watched Yinsen tinker with the Time-Turner for a while longer. Only after Yinsen flipped his hand and put the Time-Turner away somewhere unknown did Dumbledore withdraw his gaze.
"What do you think of Tom Riddle?"
Mentioning that man reminded Dumbledore of Yinsen's earlier assessment: comparing him to Tom Riddle was truly giving that man far too much credit.
At the time, his first reaction had been that Yinsen was far too arrogant. Now, Dumbledore no longer thought so. He had to admit that Yinsen had spoken the truth.
"Nothing much."
Yinsen was still speaking frankly. He sincerely thought Voldemort was nothing special, which was why, despite knowing exactly what Voldemort's Horcruxes were, he had never considered specifically collecting and destroying them.
To him, whether Voldemort was dead or alive made no difference at all—even if Voldemort finally returned to life and wanted to lead his followers in a worldwide war among wizards, as long as Voldemort did not affect him, he could simply pretend the man did not exist.
If Voldemort did affect him, he would just spend a little effort cleaning up that small fry.
Dumbledore silently muttered, Just as expected. To an existence at this level, Voldemort... was merely a weakling who could be dealt with