Power Word Kill

9th-Level Enchantment Spell (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 (HP) are a measure of how difficult it is to kill or destroy a creature or an object. Damage reduces Hit Points, and healing restores them. You can't have more Hit Points than your Hit Point maximum, and you can't have less than 0. See also Breaking Objects and Damage and Healing.

or fewer, it dies. Otherwise, it takes 12d12 Psychic damage.

Source: Player's Handbook, p. 306