Headhunter Discipline

Normally I have 6 922 ES, without the HH discipline. When I steal discipline from a rare monster. My ES only goes up to 6 923, thus an increase of 1.

I have noticed this many times, on many different maps, even in the campaign leveling a friend.

I do not have my own discipline aura, so it is not replacing that.

It's not the same as Discipline skill gem. It's based off HP.

"Nearby Allies have 40% of Maximum Life as Extra Maximum Energy Shield"