Purification Formation

Ruben rubbed the back of his head and looked at Samuel resentfully. "Stop hitting me on the head. What if I become stupid, Sam? You know that I rely on my head to live!"

"With how stupid you have always been, do you think one hit will change anything?" Samuel retorted and rolled his eyes. He looked at the formation in his hand and shook his head. Even if he were to read this several times, he was sure that he wouldn't be able to draw it.

"Can I try to make it?" Ruben was annoyed and then looked at the paper once more. 

"You can try, yes." Riya nodded. "First, memorize the runes drawn there and then try to replicate them on paper first. Once your drawing is right, you can try to use mana to draw it on the surface of a bigger rocks. Only when your mana control is good can you try to draw it on the smaller rock."

"…Smaller rock?" Ruben paused when he heard Riya's words. He thought that the formation was big.