Hours passed.
As Liam cultivated, he was simultaneously studying the Blood Arts and Revel's attempts at creating spells with Blood Weaving.
All the while, his core was repeatedly corroding away the impurities.
At the same time, he had tried to inscribe and try his hand at creating a simple spell for his darkness.
His understanding of it was so weak (by his standards) that Liam felt embarrassed as he made the Meanings and created the Links.
It was like a legally-blind person attempting to describe colors.
That's how difficult creating a spell really was, partially due to Liam's unorthodox method of inscribing.
Liam's motivation didn't wane.
Everyone had to start somewhere.
Studying Revel's parchments definitely gave him an edge over others, and the Blood Arts weren't so difficult to understand anymore.
After he concluded his cultivation session, Liam had a slight frown on his face.