Compel Suicide (5e Spell)
From D&D Wiki
|Casting time:||1 action|
|Duration:||Concentration, up to 1 minute|
A creature of your choice that you can see within range must make a Charisma saving throw. A target automatically succeeds on this saving throw if it can't be charmed. On a failed save, the creature's mind is filled with suicidal thoughts. On each of its turns, it must use its action to attempt to kill itself with any weapon it is wielding. The creature makes an attack roll against itself at advantage, and if it hits its attack is a critical hit. If the creature has a weapon on its person but isn't wielding a weapon, it draws its weapon then attempts to commit suicide. If the creature has no available weapon, it will resort to an improvised weapon. If the creature is unable to wield a weapon or its physiology prohibits it from wielding a weapon, the creature instead goes berserk.
While a creature is affected by this spell, it fights without regard to its defenses; All attack rolls against it are made at advantage. Each time the target takes damage, it makes a new Charisma saving throw against the spell. If the saving throw succeeds, the spell ends.