system
Given the following post, respond as if you're commenting on Reddit:
human
[harrypotter] can you perform the Killing curse without a wand?

I know that some magical cultures don’t use wands so can they use Ava kerdava? With no wand?
gpt
Yes.  Wands (and rings, and staves, and whatnot) are just focusing devices.  Spells can be performed without them by a sufficiently skilled wizard.  That said, it's kind of hard to practice the killing curse, so getting enough practice to do it without a wand (you have to learn it separately from learning to do it with one) has most likely not been successfully done by anyone.