Life Sheath

Acquisition
Signet of Capture:
 * Seaguard Gita (Boreas Seabed)
 * Monk's Construct (Sunjiang District)

Usage
Not very good considering that Reversal of Fortune eats up close to the same amount of damage (assuming target got hit with the most powerful RoF could take). It would negate lets say 60, then heal for 60, so you're getting about 120 HP.