system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] What laws of physics does magic defy the most?

And by laws of physics I mean science plus the universe as well.
gpt
The first law of thermodynamics is that energy cannot be created or destroyed, it can only be transferred from one form to another.

All spells (travelling through time, flying on a broomstick, healing broken bones) would require energy - sometimes huge amounts - but it's never clear where that energy is coming from and it appears to be 'created'.