As an action, you obscure a creature that you can touch or see within 5 meters from being able to perceive coming events. The creature must make a Will saving throw.
On a failure, it takes 1d4 psychic damage and has disadvantage on the next attack roll it makes before the end of its next turn.
On a critical failure, it takes twice as much damage.
On a success, it takes half as much damage.
On a critical success, it takes no damage.
At higher levels
This spell’s damage increases by 1d4 when you reach 9th level (2d4) and 17th level (3d4).