Berserk

You cause one creature you can see within range to fly into an uncontrollable rage. The target must succeed on a Charisma saving throw or become affected by the spell. On a failure, the target becomes enraged and has the following properties:

• The creature is resistant to bludgeoning, piercing, and slashing damage from nonmagical attacks (if it isn't already).
• The creature cannot cast or concentrate on spells.
• On its turn, the creature must attack the closest creature it can see. If no creature is within melee range, the target must move towards the closest available target. If two creatures are of equal distance from the target, the DM decides which creature it moves towards.

If the creature cannot see or hear any target, the spell ends. When the spell ends, the target knows its mind was manipulated and reacts accordingly, but does not inherently know who enchanted it. Creatures immune to being charmed automatically succeed on their saving throw.