Crossover: In Fairy Tail, with unparalleled comprehension

Lu Li transmigrates into Fairy Tail and gains an extraordinary ability to gain superhuman comprehension.
Any magic can be learned after seeing it once, and with a little deduction, one can comprehend new powers.
Give him a fireball spell, and he can comprehend the creation of a sun.
Give him a Wind Blade Technique, and he can comprehend and create a Dimensional Slash.
Give him an ice spell, and he can comprehend the creation of an ice age.
He continuously learned magic, comprehended and created one spell after another.
When we are actively preparing for future crises.
"You are invited to join the Dimensional Chat Group!"
"Join now?"
"join in!"