Maximum Blood Restitution.
As soon as the words left his mouth, Sudn activated a few healing spells to keep Hunter's condition stable, just in case things went south.
However, the chances of that happening were very low...
{Blood Restitution} had evolved from the spell, {Blood Regenration}. It made use of Cain's affinity for the blood element, as well as his special {Eye of Clairvoyance} to locate the elemental blood particles and direct them into his body. When the skill evolved to {Blood Restitution}, he gained the ability to use it on others...
What made the skill so great, was that it affected the vitality, HP, and MP of the targeted host all at once. By using his powerful spirit to guide the dense energy into the body, Cain was in a sense, breathing life into the body, since the Blood element was simply a paraelemental of the life element...