The Master is one of FLAK's Skill Trees in Borderlands 3.
FL4K
Guard Skag
Gamma Burst
Ferocity
Persistence Hunter
Go For The Eyes!
Atomic Aroma
Who Rescued Who?
He Bites!
Frenzy
Empathic Rage
Psycho Head On A Stick
Hive Mind
Great Horned Skag
Endurance
Barbaric Yawp
Mutated Defenses
Eridian Skag
Burst Aid
Pack Tactics
Shared Spirit
Dominance