Jaelommiss
First Post
I like this, but I would tweak it a little bit. I put my changes in bold above. I specified the living due to some other comments about healing zombies, although I don't think they have HD, but I'm AFB. I added the willing part so that this doesn't become an offensive thing by draining HD from a NPC. Not that it's really abuse able without these changes but I thought I'd add them.
I'd take this on my fiendish bladelock if I could.
I agree with your changes. The only possible point of concern is that an unconscious ally might not be considered willing to some DMs. Perhaps "living ally" or "friendly living creature" would be a better way to word it. If a living ally does not wish to expend a hit die at that time (I imagine someone in the middle of a fight might want to save their HD for proper healing on a short rest or after the fight) the wording of "the creature may spend 1 Hit Die" makes it the target's choice. "May spend" is explicitly different to "must spend." I feel all rules lawyery and dirty now...
Additionally, I am unsure if having the THP only last for one hour is enough. Since a HD is being spent (not insignificant resource) it might be fair to boost the duration. On the other hand, if this spell is being used during a fight it is probably because the target needs health immediately and no one has any spell slots or potions left. Thoughts?