You know, that might not be unreasonable since your limited in how much you can heal per turn, how about a 0 point trait,
Frail Giant, or Frail Sturdy Man: +1 hp/level, 1/4 poison and heal 1 hp/season - i think 1/2 poison would be too good - although it could just be spiders that have posion, in which case 1/2 poison - i know there are a small number of posion weapons.
Could call it Cold blooded, or Endurance of the Reptile. Naga Blooded, are those humoungous lizard things sivaks - no that's not right. uhg - Drake Lineage etc.might want to creat some 2 point positive and negative traits and then limit someone to three traits.
(and the magic number shall be three, not two, two is too small, and certainly not four - for four is too many....)