Lashing Tail

You gain a tail attack that you can use as a bonus action. This attack gains your Strength modifier to damage. The base damage and reach are determined by your age. This attack deals bludgeoning damage.
Wyrmling: 1d6, 10-foot reach
Young: 1d8, 10-foot reach
Adult: 2d8, 15-foot reach
Ancient: 2d8, 20-foot reach