The Health Augmentation is one of the eight Augmentations from Fable, Fable: The Lost Chapters and Fable Anniversary. It is a rare augmentation, being difficult to find and is therefore of greater value, but it can constantly regenerate the user's health.
Only four swords carry it: the Sword of Aeons, Solus Greatsword, Avo's Tear and The Bereaver. It should be noted that Avo's Tear and The Bereaver are only available in Fable TLC and Anniversary.
This regenerates Health continuously while the augmented weapon is assigned as your melee or ranged weapon. Bind this Augmentation to your Weapon through the Weapon Menu. Remember, this is permanent!
It can be bought from the weapon smiths in Bowerstone North (only one available) and Snowspire Village (restocks every 10 days). One can be found in a Silver Chest in Witchwood Stones.