Chain Reaction
While you have an enemy Phaselocked all of your bullets that hit enemies have a % chance per level to ricochet and hit another nearby enemy.
Cloud Kill
Shooting an enemy creates a lingering Acid Cloud, which lasts for 5 seconds, dealing constant Corrosive Damage to enemies who touch it. Only one Acid Cloud can be active at a time.
Backdraft
Your melee attacks deal additional Fire Damage. Also, when your shields become depleted you create a fiery explosion, damaging nearby enemies. Your shields must fully recharge between explosions. Backdraft Damage Rank per level.