What is his talent?
Jason knew it clearly.
When facing anomalous beings, the hunger becomes more prominent, allowing him to smell the 'aroma' that only truly exquisite food possesses.
This conclusion was reached after countless experiments and trials.
And that black notebook?
Does his ability to traverse different parallel worlds through it count as an anomaly?
Yes!
Of course, it does!
Moreover, it's a very magical, powerful, and special entity.
In other words, it must taste delicious.
However,
Jason had never smelled even a hint of fragrance from it.
This was not normal.
Faced with such a situation, Jason always remained vigilant.
Compared to the 'black notebook' he 'picked up', Jason trusted more in his awakened talent.
Thus, he always kept this 'idea' hidden in his heart.
Just like his true name.
Then, he observed the changes in the black notebook.
Every subtle change was noted by him.
Yet he wouldn't dwell on it.