The stonemasons and their apprentices were resting on the ground and watching with eyes of admiration and reverence while the materials were lifted into the air with Heidi's magic guiding. It was then drawn on the surface of the cliff with precision while a giant translucent palm was assisting on the side. It would remove the vines that would affect the drawing of the magic circle or adjust the minute details of the runes' lines. It would also embed the crucial parts with enhancement materials like magical crystals. Furthermore, the various spaces of craters and pits that they had dug out were filled with sparkling crystal 'grits'.
In their eyes, those crystal fragments that were only the size of a rice grain were indeed like 'grit'.