Call of the Void

Your dark whispers reach into the mind of a creature within range, compelling the creature to seek its end. The creature must succeed on a Wisdom saving throw or be charmed until the end of the creature's next turn and the sacrificial dagger appears in the creature's hands. At the beginning of the creature's next turn, they plunge the blade into their heart, instantly killing themselves.

Until the start of the creature's next turn, creatures may attempt to grapple to dagger away from the target with an opposed Athletics check. Otherwise, the effects can only be ended by the means of Greater Restoration or a Wish spell, or by breaking the caster's concentration.

Equally, the target can be incapacitated by other means until the end of the spell's duration.