You constantly Regenerate Health.
The lower your current Health, the more powerful the Regeneration.
Killing an enemy causes your Shield to quickly regenerate and increase your Reload Speed for a few seconds.
Phaselock causes enemies to turn on their friends instead of being locked down.
Additionally, Phaselock's Duration is increased.
Enemy-on-Enemy Combat: +100%
Phaselock Duration: +4s
If the enemy you have Phaselocked is killed, it generates Life Orbs that automatically seek out and heal you and your friends.
The healing is stronger when you or your friend's health is low.