(Heartfelt thanks to 'Yume no Shouyou', 'Lei Xiang', 'Chen Jiale666355', 'Yunqi Qinggu', 'Snow Bubble Radish', 'Kousaka Kami no Go', and 'Erciyuan de Shuangxiezuo' for their tips!)
The next day, the weather was clear...
Azure skies, white clouds, bustling streets, tranquil surroundings—everything seemed so peaceful and refreshing.
On a corner of the street, Rin Tohsaka carried a shoulder bag and wore the same casual clothes as the night before. As she passed among the pedestrians, a faintly unhappy expression rested on her face.
She reached into her bag and pulled out a bankbook. Seeing the numbers inside, her already displeased expression immediately turned extremely sour, even taking on a hint of misery.
Today, Rin Tohsaka planned to visit the gemstone shops in Fuyuki City and purchase some gems.
To Rin Tohsaka, gemstones were an indispensable part of her life as a mage.
Because the magecraft she used was called Jewel Magecraft!
It was a general term for magecraft in which the user stored their own magical energy and spells within gemstones, then used the gems to activate them.
With Jewel Magecraft, the user could pour their magical energy and the formulas of their usual spells into gemstones ahead of time. When needed, they would not have to follow the original casting process, instead using a single procedure to trigger the magecraft stored within the gem.
This Jewel Magecraft, which allowed spells to be prepared in advance and magical energy to be stored in gemstones for activation, was a very famous form of magecraft.
After all, when users of Jewel Magecraft activated it, they basically only needed to trigger the spell formula and magical energy already stored within the gem to unleash the completed magecraft. It required only one step and did not even consume magical energy, making it extremely convenient.
Moreover,