By conjuring the wings, claws, or tail of an ancient dragon, you can take one of the following Legendary Actions immediately after another creature's turn. Once you use this feature to take a Legendary Action, you can't take that one again until the start of your next turn. You can use this feature three times and regain all expended uses when you finish a Long Rest. You can also restore one use of it by expending a level 2+ spell slot (no action required).
Rend
You move up to your Speed and cast a Cleric cantrip that has a casting time of an action or make one melee attack using a weapon or an Unarmed Strike. The attack uses your Wisdom for the attack and damage rolls instead of using Strength or Dexterity.
Tail Swipe
Each Large or smaller creature you choose within 10 feet of you gains the Prone condition.
Wingbeat
You immediately move up to your Speed. During this movement, you have a Fly Speed up to your Speed and don't provoke Opportunity Attacks.