Chapter 420: Conceptual Craft Essence

"What is this thing..."

Tao Yu held the gemstone sword blueprint in his hand, feeling a profound shock in his heart.

Even now, because of the "Innate Demonic Body," his enlightenment had improved, and with the integration of the "Dao Heart Demon Seed (Imaginary Number Magic Edition)" to make up for his magical circuits, he had already drained all the basic spells that could be learned from Rin Tohsaka and Illyasviel within a month.

He was even attempting to restart the doll workshop of the Einzbern Castle.

Yet, even so, when he got hold of this gemstone sword blueprint and looked at its complex patterns, he felt a sense of awe.

He also understood that even though this was just a way to create a magical artifact, and its effectiveness would decline outside of Fuyuki, due to the concept of parallel space, the decrease wouldn't be too significant!