Evil Eye of Petrification

You turn a vile gaze toward a creature of your choice within range that you can see. Your gaze it like that of Medusa and begins to turn a creature to stone. The Creature must make a
Constitution saving throw or begin to become petrified. On a failed saving throw the creature's movement speed is reduced by 10 feet. If the creature fails the saving grow by 5 or more it’s movement speed is reduced by 20 feet. On a success, the creature regains 10 feet of movement. If the creature succeeds by 5 or more it regains 20 feet of movement speed. The creature repeats this saving throw at the end of each of its turns.
If a creature reaches 0 movement speed they become petrified. The petrification lasts until it is freed by the greater restoration spell or other magic.
The spell also ends if the target is ever outside the spell’s range or if it has total cover from you and the creature's movement speed is restored at the end of it's next turn.