The Quarry Warden's Brow is a Nightmare Unique helm, hunted from The Mountain Sire in the Mortal Arena, always at item level 120. It is one of four ordinary drops on its list — 22.5% of the Uniques that boss gives up, about 1 in 4 — and every kill rolls the list 5 times. It is built on Sovereign Stonegaze Helm — step 6 of the Stonegaze Helm line, item level 80 and up.

It always rolls the same numbers: +72 Armor, +327 Maximum Health, +36 Armor, +11% Stone Damage, +157 Armor, +391 Ward and +38% Crumble Effect.

One Unique drop in 40 is a Mythical copy: the same item carrying 15–25% Mythical Energy that boosts every stat on it and can never be changed; the 15% floor is 10 times as common as the perfect 25%.

On top of that it carries The Quarry Warden's Brow — You have 55% more Armor.

“It has looked at a lot of rock. It approves of you.”