Tiny

You touch a creature you can see. The creature can roll a CHA saving throw, with the creature avoiding the spell on a success. On a failed saving throw, the creature's size goes down by 2 if it's size is Large or higher, and goes down by 1 if it's size is Small or Medium. If the creature is Tiny,  this spell has no effect. A creature effected by Tiny can roll a CHA check, ending the effect on itself on a success. If the creature fails the check, it can't attempt the check again until 2 hours pass. The caster of the spell can dispel the spell at will. If another creature casts tiny on the affected creature, the effect ends.