He is the descendant of a fallen nobleman without any magical talent.
The only thing he was proud of was his super memory and the knowledge of magic circles he knew by heart.
Another point is that he can run very well and has great physical strength, which is completely different from that of a mage.
One day, after he signed a contract with a low-level monster, he had the "most useless" talent of magic induction. He began to use his amazing running speed to create various giant magic circles. Among them, there are both money-making teleportation and forbidden spell-level magic arrays for regional powerhouses.
As long as he is given a suitable terrain, he can create a barrier to imprison angels!
Just give him a space and he can make it impregnable!
His name is Yi Ke!