HP drain over time config options

[Yowesephth]

Given 1.4 has been about medicine and healing, and also given that the ability to ride and fly and swim with your team of pokemon is a pretty powerful ability, I think it'd be good if there was an option for an amount of damage / block they might take to add somethin of a balance to riding them around.
def not a config option for everyone, but, some upkeep to this would be nice if optional