Tony's Terrible Torsion

You inflict a most heinous injury upon a male creature. It takes 5d10 psychic damage, and is subject to the most intense pain imaginable. A target is unaffected if it is immune to psychic damage. While the target is affected by this terrible torture, any speed it has can be no higher than 10 feet. The target also has disadvantage on attack rolls, ability checks, and saving throws, other than Constitution saving throws. Finally, if the target tries to cast a spell, it must first succeed on a Constitution saving throw, or the casting fails and the spell is wasted. A target suffering this pain can make a Constitution saving throw at the end of each of its turns. On a successful save, the spell ends.