Prerequisite: a climb speed, access to the Spider Climb spell, or access to an Unarmored Movement feature that allows you to climb. 

You become adept at traversing vertical surfaces and using them to your advantage in combat. 

• Your climb speed becomes your walking speed +5 additional ft
• You can use your climb speed to traverse ceilings. 
• If you take an attack against a creature by jumping from a wall or ceiling and hit it, given that the creature is no more than 10ft (horizontally) from you, it must succeed on a Strength saving throw, DC = [8 + Prof. Bonus + STR], being knocked prone and pushed 5ft. in a direction of your choice. You can move away without incurring opportunity attacks if the creature was knocked prone. If the creature is Huge size or bigger and it fails its strength save, you can choose to either push it 5ft or knock it prone.
• When you take an attack in this way, you can add a d6 of damage to the attack for every 5ft you fall if the drop is at least 10ft. 
• When you take an attack in this way, roll a dexterity saving throw when you land. The DC equals 5 + the additional damage you dealt in the attack from falling. If you succeed, you take no fall damage. If you fail, you take fall damage as normal.