Flash Step

Transcenence, Dexterity 18 or higher

You have mastered the ability to leap through space in an instant.   You are no longer limited in the number of times you can use instant movement, and the range becomes twice the amount of movement you spend on it.   Additionally, you can cast Dimenson Door without using a spell slot. When you use this ability, roll a hit die. You lose a number of hit points equal to your roll and your hit point maximum is lowered by the same amount.   The number of dice you roll increases by 1 for every time this ability is used. Your hp max and number of dice rolled both reset when you finish a long rest.