Power Word Kill

Source: Player's Handbook

Level 9 Enchantment (Bard, Sorcerer, Warlock, Wizard)

Casting Time: Action
Range: 60 feet
Components: V
Duration: Instantaneous

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.