Endurant Faith is a Unique Gloves in Diablo IV Season 15 for All classes. It comes from General Unique Pool; General Unique Pool - every Lair Boss (Initiate, Greater, Exalted, Belial) can drop it in addition to their dedicated table.
Unique power
When you would be damaged for at least 30% of your Maximum Life at once, it is instead distributed over the next 4 seconds and reduced by [15 - 20]%.
Affixes
Primary Core Stat
Maximum Life
Where it drops
General Unique Pool
General Unique Pool - every Lair Boss (Initiate, Greater, Exalted, Belial) can drop it in addition to their dedicated table