system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] If the Killing Curse is so hard to pull ff, and literally tears your soul apart in the process of casting, then why does anyone bother with it?

It would be just as simple to levitate  a mother fucker three hundred feet up and drop them, or set them on fire, or blast a hole through their chest.  Conjure an attack-monster or just straight up stab someone.

Why go to all the trouble of using the special "kill you" spell, when a ton of other basic utility spells can be just as lethal?
gpt
*Any* form of murder rips the soul. It is an act of ultimate evil. The fact that the Killing Curse see such widespread use is because it is cast by Dark Wizards and Witches who *want* to kill, with every fiber of their being, they mean for their victim to die. That and unlike other curses it is nearly impossible to block magically. 

A Blasting Curse or Severing Charm or any other manner of curses could kill, but it is not guaranteed, can be blocked by a powerful enough Shield Charm or similar enchantment, and honestly, a little messy. The Killing Curse kills, leaves no mark, and to be hit with one is to die instantly. Therefore, it is useful to a murderer, soul tearing or not.