Hunter Kill Skill. Whenever FL4K kills an enemy, they gain a stack of Interplanetary Stalker. For each stack of Interplanetary Stalker, they gain a bonus to all damage and pet damage delt.
Additionally, they gain a unique stacking bonus depending on the type of enemy killed. Each unique bonus can stack up to 3 times. Each stack decays after a short time.
Damage: +2% /stack
Pet damage: +1% /stack
Human Bonus: +3% Action Skill Damage /stack
Robot Bonus: +1.5% Corrosive Damage /stack
Beast Bonus: +2% Movement Speed /stack
Eager To Impress
Kill Skill. Whenever FL4K kills an enemy, Action Skill Cooldown Time is reduced. Whenever FL4K's pet kills an enemy, Action Skill Cooldown Time is reduced even more and Attack Command's cooldown is refreshed.
Pet Kill Cooldown Time: -0.5 seconds
FL4K Kill Cooldown Time: -0.25 seconds
While there are no enemies nearby, FL4K's Weapon Handling and Critical Hit Damage are increased.
Critical Hit Damage: +4.0%
How to farm: Peregrine
Boss: Dr. Benedict
Dr. Benedict: 10%
Mayhem 4+ Items only drop while Mayhem 4 or higher is active.
All Mayhem 4+ Items have a small chance to drop from some of the Bosses in the Maliwan Takedown.
World Drops are items that drop from any suitable Loot Source in addition to their other sources.
Psycho Krieg World Drops are items that drop from any suitable Loot Source, within the DLC, in addition to their other sources.
Suitable Loot Sources:
Most Enemies: Bosses, badass or non-badass enemies, ...
Red Chests, lockers, garbage containers, cardboard boxes, garbage/skag/... piles
All Enemies: Bosses, Crew Challenges, Generic Enemies, ...