Befuddlement
You blast the mind of a creature that you can see within range. The target makes an Intelligence saving throw.
On a failed save, the target takes 10d12 Psychic damage and can’t cast spells or take the Magic action. At the end of every 30 days, the target repeats the save, ending the effect on a success. The effect can also be ended by the Greater Restoration, Heal, or Wish spell. On a successful save, the target takes half as much damage only.
Befuddlement 5e 2024 vs. 2014 edition differences
The 2024 version increases psychic damage from 4d6 to 10d12, changes the effect to prevent casting spells or taking the Magic action instead of reducing mental scores, and clarifies the saving throw mechanics with half damage on success. The duration and saving throw repetition remain the same.