Power Word Kill
You compel one creature you can see within range to die. If the target has 100 Hit Points or fewer, it dies. Otherwise, it takes 12d12 Psychic damage.
Power Word Kill 5e 2024 vs. 2014 edition differences
The 2024 version adds that if the target has more than 100 hit points, it takes 12d12 psychic damage instead of no effect; the 2014 version has no damage component and only kills if hit points are 100 or fewer.