system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] How are new spells discovered?

Is there a job to just say random words and wave your wand till something happens?
gpt
They're not. They're invented. The incantation is a mnemonic device, not some kind of Word of Power, which is why it's possible to cast spells without speaking once you've got some training and experience.