You can instantly revive a friend in Fight for Your Life by using Phaselock on him/her.
While having an enemy Phaselocked you and your friends Regenerate Health.
Cloud Kill (Skill)
Shooting an enemy creates a lingering Acid Cloud, dealing constant Corrosion Damage to enemies who touch it.
Only one Acid Cloud can be active at a time.
While you have an enemy Phaselocked all of your shots that hit enemies have a chance to ricochet and hit another nearby enemy.
Chain Reaction only works with bullets.