Short Story: Demon

A demon lord attacks MC's home

World

A modern world with magic and demons. Not everyone has magic inside their body or the same amount of it for those who do, but everyone can use magical artefacts and some rituals that use ambiant magic.
There are extansive books teaching magic, and the internet is full of artisanal spells and rituals - results not guaranteed.

Characters

MC

She is an engineer and works in creating new designs for circuit card that control magic and that are used in making magical artefacts. As a hobby, she also makes circuit cards in her home and uses them to make artisanal artefacts.

The demon lord