Game Night!: This weekend! https://www.facebook.com/events/317792721696252/
One of three mechanical guardians in the Black Throne tower. They protected the power sources necessary for freeing Azrael so they had to be disassembled. I used the Voidwalker to jump on top of it and disrupt its power core. Then I dropped down, cut its flail-like arm off and beat it to death.