Chronal Lance

You inflict the ravages of aging on up to three creatures within range, temporarily discomfiting them and making them appear elderly for a time. Each target must make a successful Wisdom saving throw, or its walking speed is halved (round up to the nearest 5-foot increment) and it has disadvantage on Dexterity checks (but not saving throws). An affected creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.