Adrien stared at the paper in awe - and he shuddered. "This... this is a summoning circle?...".

"Yes", Val replied with a nod, looking down at him from where he was standing. "Once you draw this symbol, you must give an offering. Commonly, that offering is a drop of blood".

Adrien looked up at Val. "Blood?...", he repeated, his heart beating fast.

"I know it is not easy, but that is the way it is", Val said - his voice was soft, a little more than a whisper, but there was a sense of urgency in his words. "The blood can be drawn from anywhere, as long as it is from the summoner. It can be done by pricking one finger with something sharp. You must place the blood in the center of the larger circle, on top of the Eye; when you do so, the circle will start glowing... After that, you will need to stay within the smaller circle", he then said, running one finger on the line that was on the paper. "There, you must recite the incantation that you see around the circle. You must then end it with: 'come to me, demon'".