system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Would there be a cost for using Avada Kedavra continuously?

So I understand in order to use this spell, you must really **mean** it - aka having the anger/hate within you. Providing you did mean it, could you continually cast it with no physical/mental/magical cost? Does this apply to all other spells?
gpt
> Providing you did mean it, could you continually cast it with no physical/mental/magical cost? 

Yes- most dark wizards do.

(think of it less of a magical cost and more in the same way that you can't use a gun if you don't mean it- no matter how technically skilled you are at shooting, if you aren't willing to kill, you can't point it at someone's head and pull the trigger)