Victor Novak's Key

One of the first items that Viktor Novak created was an unusual key. Ordinary keys were only suitable for tightening bolts. If runes were inscribed on the mechanism or magical objects were used, the keys were destroyed.
 
Then Victor remade one of them, adding runes and a magic crystal. The inventor also expanded the capabilities of the instrument, allowing it to increase or decrease. All this led to the fact that the key became not just a tool, but also a weapon.
 
One day Victor was returning home and he was attacked by a group of demons. They wanted to destroy Novak and take away his technology. But Victor took out the key and with its help was able to create a few simple casting spells and destroy demons.
 
Rumors about Victor's incredible device quickly spread throughout Ericuria and many wanted to get an unusual key for themselves. But the scientist was adamant and did not make a single copy of his unusual device. He believed that people would start using his device to harm each other, and he could not allow science to be used against humanity.