Elemental Fear

The targeted creature must succeed in a 18 CON throw. If it fails the nearby element will take the shape of the creature's worse nightmares for 1 hour.

While frightened by this spell, it wont be able to make an action if it was not focused on an opponent. If they were, the creature deals 10d4 damage less and takes 2d20 damage until the Fear vanishes. If they weren't focused on anything, they wont be able to make any action until their Fear disappears, and for the next hour they will deal 5d4 damage less.