Life Stealing Critical is a passive feature that deals extra damage on a critical hit and also gives you temporary hp.
Description
On a Critical Hit, the target takes an extra 10
NecroticDRS damage as long as it isn't a construct or an undead. You also gain 
10 temporary hit points.
Can only have temporary hit points from one source.
Condition: Temporary Hit Points (10)
- Kept from death's door by a brief magical boost. Gained 10 temporary hit points.
How to learn
Granted by the weapons:
Notes
- Despite the description not specifying otherwise, this ability only functions when you land a critical hit with its source (Sword of Life Stealing), and does not passively apply to other equipped weapons.