After the First Wizarding War, the Malfoys avoid being sent to Azkaban for their crimes committed in service of The Dark Lord, Voldemort, by falsely claiming they had been under the Imperius Curse, which takes away one's free will.

Source: https://collider.com/harry-potter-narcissa-malfoy-movie-book-differences/

As a member of the Fellowship of the Ring, Gimli was tasked with aiding Frodo Baggins (Elijah Wood) in his quest to destroy the One Ring, which was forged by the mysterious and powerful Dark Lord Sauron.

Source: https://screenrant.com/lord-rings-gimli-quotes-best/

As a wizard who often used the killing curse left and right, the Dark Lord himself also faced this deadly spell, although indirectly.

Source: https://gamerant.com/harry-potter-wizards-survive-forbidden-curses/

But the Orcs in the east had far more sustainable lives, with settlements they had run for years without any worship of the Dark Lord.

Source: https://www.cbr.com/sauron-annatar-form-fooled-orcs-lord-of-the-rings/

Following Luke’s escape on Bespin, and despite his master’s summons, Vader embarked upon a mission to track down and punish all those who covered up the boy’s existence, to the true Dark Lord of the Sith’s displeasure.

Source: https://www.cbr.com/star-wars-darth-vader-sidious-most-powerful-sith/

He needed to do something to show the Dark Lord that the Malfoy family was loyal.

Source: https://screenrant.com/draco-malfoy-after-harry-potter-ending/

It is common knowledge that the Dark Lord never hesitates to use the killing curse on any living beings, including the great wizard, Dumbledore.

Source: https://gamerant.com/harry-potter-wizards-survive-forbidden-curses/

The Dark Lord didn't expect subterfuge.

Source: https://www.cbr.com/lord-of-the-rings-beorn-sauron-fight/

The Dark Lord of the Sith is not an easy opponent, but this guide will help with Darth Vader in Star Wars Jedi: Survivor.

Source: https://gamerant.com/star-wars-jedi-survivor-how-beat-darth-vader-tips-strategies-defeat-boss-guide/