Turtle Master

You touch a creature, which if not willing, must make a Constitution save against your spell save DC. Upon failure or if it is willing, its legs weaken and its arms strengthen. Upon a success, the spell has no effect. The creature loses 5 feet of movement and gains +1 to all Strength checks and attacks made with the Strength modifier. For every level upcast, the target loses an additional 5 feet of movement and gains an additional +1, until their speed reaches zero. This effect lasts 1 hour or until dispelled.