Blood Propulsion Integration (Homebrew)

You have discovered how to expend massive amounts of blood fuel as a resource to further your athleticism and movement ability. You may expend hit dice (up to half your level) each turn, receiving no healing benefits, in exchange for the following effects:

• You gain a cumulative flying speed of 5 feet for each hit dice used in this way, until the end of your turn, as you are propelled in the target direction.
• As a reaction when falling, you may expend one hit dice to slow every 20 feet of a fall.
• When jumping, you can use this feature to extend the jump a number of feet equal to the roll of your hit dice as you are jet-propelled toward your target.
• When making an athletics or acrobatics check, you can gain a benefit to the roll equal to the roll of your hit dice. You can choose to spend a hit dice in this manner after you roll the check, but before the outcome is determined.
  

You may not use any of these abilities while encumbered.