Torpor

You drain your target on a great portion of their strength, their knees become weak with the sudden physical and mental taxation.

You make a melee spell attack against the target. The target suffers 2 points of exhaustion for 1 minute. The target can make constitution saving throws against your spell DC at the end of each of its turns. If they succeed on a save, they lose both points of exhaustion and cannot be affected by the spell for the next full day.