Feeblemind

8th-level enchantment

Casting Time: 1 action
Range: 150 feet
Components: V, S, M (a handful of clay, crystal, glass, or mineral spheres)
Duration: Instantaneous

You blast the mind of a creature that you can see within range, attempting to shatter its intellect and personality. The target takes 4d6 psychic damage and must make an Intelligence saving throw.

On a failed save, the creature’s Intelligence and Charisma scores become 1. The creature can’t cast spells, activate magic items, understand language, or communicate in any intelligible way. The creature can, however, identify its friends, follow them, and even protect them.

At the end of every 30 days, the creature can repeat its saving throw against this spell. If it succeeds on its saving throw, the spell ends. The spell can also be ended by Greater Restoration, Heal, or Wish.

Spells by Class:

Artificer Spells
Bard Spells
Cleric Spells
Druid Spells
Paladin Spells
Ranger Spells
Sorcerer Spells
Warlock Spells
Wizard Spells

Spells by School of Magic:

Abjuration Spells
Conjuration Spells
Divination Spells
Enchantment Spells
Evocation Spells
Illusion Spells
Necromancy Spells
Transmutation Spells