Lifegiver and Sustainer is a research option found under the Artifice tab can be purchased with 3 levels of experience after researching Infusion Enchantment and the Verdant Heart Band. The research allows for 2 unique, and mutually exclusive, enchantments to be placed on the Verdant Heart Band, them being the Lifegiver and the Sustainer enchantments. Both help to remedy effects the Verdant Heart Band on its own lacks - the ability to heal the players health and to provide necessities like air and food. Both enchantments are applied via Infusion and are classified as being of Moderate Instability.
The Lifegiver enchantment allows the Band to, along with performing its normal functions, to heal the player 1 half heart of health for 5 Vis, or approximately 2.5% of the Band's total internal storage. One can imbue this enchantment by Infusing a Verdant Heart Band with a normal golden apple, 1 piece of Victus and Humanus Crystallized Essence and a potion of regeneration (45 seconds), along with 64 Victus and Humanus Essentia.
The Sustainer enchantment allows the Band to, along with performing its normal functions, replenish 5 points of air or 1 point of hunger for 1 point of Vis each, or approximately .5% of the Band's total internal storage. One can imbue this enchantment by Infusing a Verdant Heart Band with a Triple Meat Treat, 1 piece of Aer and Desiderium Crystallized Essence and a potion of water breathing (3 minutes), along with 64 Aer and Desiderium Essentia.