100% increased Maximum Recovery per Life Leech Life Leech effects are not removed at Full Life 10% reduced Damage taken while Leeching  Brutal Fervour is a notable Ascendancy passive skill for the Slayer that grants increased damage, attack speed, and damage reduction while leeching life. It also modifies life leech effects to not get removed when the player reaches full life.
This effect does not work with
Ghost Reaver, as leech effects are removed at full energy shield. In the case of instant life leech effects, such as  Bloodseeker and legacy Atziri's Acuity, the leech end immediately regardless of whether you are at full life or not — Endless Hunger does not preserve or store such effects.
100% increased Maximum Recovery per Life Leech 10% reduced Damage taken while Leeching Removed
15% increased Attack Speed while Leeching
50% increased Attack Damage while Leeching 6% reduced Damage taken while Leeching
No longer grants 100% increased total recovery per second from life leech.
Now grants 15% increased attack speed while leeching, 6% reduced damage taken while leeching, and 50% increased attack damage while leeching (from 30%).
No longer grants
stun and bleed immunity while leeching. Now grants 30% increase damage while leeching. Added Life Leech effects are not removed at Full Life.
Brutal Fervour no longer grants +10% of maximum Life per second to maximum Life Leech rate.
Old: 30% increased Damage while Leeching, 5% increased Attack Speed while Leeching
New: +10% to maximum Life per second to maximum Life Leech rate, 100% increased Life Leeched per second, Cannot be Stunned while Leeching, You are Immune to Bleeding while Leeching