“I think your innate talent ‘Magic Talent' allows you to learn a spell that would normally take eight years in just four years? I’m not a magic chanter, so I’m not sure how great that is.”
Since Ainz had a magic related class, he was curious and desired to collect this information. Getting abilities not available to the Great Tomb of Nazarick would be useful for his guild. If there was a way to steal this ability, it would be worth the risk even if he had to make enemies.
The ability to shorten learning time should be a type of level surpassing magic, 「Wish upon a Star」.
The two of them continue to converse, unaware of Ainz’s menacing look under his helmet:
“... I am lucky to possess this ability from birth, it allows me to take the first step for my dream. If it wasn’t for this ability, I would be just a commoner spending his whole life busily.”