Madision Hospital on Hard
Do normal until the end rooftop boss fight.
Run past the mobs and snipe the boss WHILE HES ON THE BALCONY
He spawns on the bottom with no name
Kill him and lets the adds kill you
Loot disappears after 15 mins or so, so pick it up.
https://www.youtube.com/watch?v=RUYBKyJifEE