Han Sen didn't know what would happen if the geno tablet saw the 24 strokes of the geno spell. If he drew them one by one, the geno tablet might end up stopping him or erasing the progress he was making.
When he put down the geno spell, he put down a formation trick. He drew some on the left and some on the right. The knife marks left behind were done in a way that it did not appear to be connected. Actually, all he did was change the order in which he wrote down the spell. He also did not write down the last line of the 24-stroke geno spell.
After arranging it, he could use one knife swipe to finish the 24-stroke spell. According to the password's order, the geno spell would be completed by that knife.
Seeing the 24-stroke geno spell light up, Han Sen was not happy. He did not know if the 24-stroke password would even work.
