Patlin said:
I'm hoping for a limited number of heals per recipient per day (or hour.) The devil is usually in the details, and without reading the whole thing I'm not at all certain we know enough to comment.
Tons of possibilities exist. The feat might heal the recipient but fatigue them, for example.
Or, given that many of the other feats in the same category work only for those with access to a certain domain, maybe it will work only for clerics with access to the Healing Domain. That's my suspicion (or rather, the hope I cling to).
My problem with this (should there be no more limits than what the preview say) is not so much rules but flavour. I like the more gritty and dangerous side of things, where wounds and injuries do not get healed as easily. It adds more to the athmosphere of things; it is already difficult enough, at times, to get people to take death seriously with the resurrection spells out there.
As someone mentioned, this means that every town with a good cleric can live on without fearing injuries anymore. Unless they take you straight down to -10. The good cleric does not have the excuse 'I have to save my power just in case I really need it' anymore, if this is, like other reserve feats, is unlimited and unrestricted. In Eberron, for instance, this would make it really difficult for Jorasco - the clergy would heal without asking money, without spending any resources themselves, without having to manage their resources.
I also see this as stepping on the paladin's toes, and anyone else with lay on hands. Okay, so they can heal more hitpoints at one go, and use it to damage undead in combat. But, again, flavourwise this ability seems laughable. The cleric now can lay on hands better, and in the situation most people will be familiar with - few commoners run around needing to be healed 40 hp in one go - they'll just have less respect for the pally, by comparison.
Thus, if there is no further limit to the feat - and I suspect there must be - I will either limit it to those with access to the Healing Domain (their domain has never been very attractive, imho, anyway), or else to members of House Jorasco with the dragonmark as a requirement.
Also, someone pointed out on the WotC boards that clerics do not even have to prepare a cure spell to be able to use this field (again, assuming the text does not impose any limits; something which, again, I do not believe or want to believe). They can cast cure spell spontaneously, which is enough to satisfy the requirements for reserve feats so far. Thus, as long as a cleric has a single spell available to cast, he'll be able to heal people.