Here is the re-write I was playing with:
"If you descend at least 10', as an action you can move up to 5 feet horizontally for every 1 foot you descend in the air, at no movement cost to you, up to 150' total."
"If you descend at least 10', as an action you can move up to 5 feet horizontally for every 1 foot you descend in the air, at no movement cost to you, up to 150' total."
