10 Deadliest Spells In The Harry Potter Universe
2. Entrail-Expelling Curse
What does it do? Causes a person's insides to be violently expelled from the body.
The Entrail-Expelling curse is one that we never get to see being used on-screen, and that's not a surprise, given that Harry Potter is a family-friendly series and this particular spell would make a mess akin to those found in the many, many Saw sequels.
That being said, it wouldn't be a surprise if we learnt that it had been used by Voldemort and his army of sadistic Death Eaters during one of the many deadly battles they had with wizards who were fighting for good. Expelling a person's entrails would certainly come in handy for, you know, winning those battles, and there's a high, high chance that it would cause an incredibly painful, bloody death within minutes of being cast.