Depenting on which of the 4 nameds you killed last, a Final named will spawn.
Gavitzle - Nasty little guy located in area around (-171.26, -2.84, -127.22)
He calls minions, then surrounds himself in a protective cube. Goo-type bombs
materialize one-at-a-time. You need to lead the bomb to Gavitzle's cube. It will
attach itself to the cube and explode. Gavitzle teleports around the place,
spawning adds. Eventually he & his cube are wounded enough to kill him.
The Quarry Behemoth
The Fire Gazer (located on lower level near lava pool at (97.20, -7.72, -153.96)
You must complete small ring event to spawn this guy.
Note: To get to lower level - (31.79, 33.61, -158.96). Lift Mechanism. Step on the
platform and activate to raise/lower elevator.
"Ornate Crate of Goods" drops from each named mob. When examined, it indicates LEGENDARY "Possible Rewards: You think there might be something hidden inside..."
However, upon looting the crates most of them indicated
"Item Received! You've been awarded the following:" ... and nothing follows nor is anything received.