This passive increases the rate at which you regenerate health. It can be slotted in a defensive or balanced passive slot. As you receive damage, your healing rate will steadily increase, up to a maximum of 250% (at rank 1). The amount of healing decreases over time, especially if you are attacking. But if you start taking damage again, the healing rate will climb back up.
This is considered a very good passive due to the fact that you can always duck around a corner or go into block mode in order to let this power work its magic. It is not good against alpha strikes or huge hits from major bosses. This is a balanced passive that is good in some situations and not so good in others. Overall, it will serve you well.
STAT FOR SCALING: Recovery - increases the amount of healing per tick.
Advantages of Note: None. Higher ranks increase the amount of healing. If you are going to take this ability, you should raise it to rank 3 as soon as possible.