The Warden's Master Key

Unique one-handed axe · item level 56 · needs Attack 75

Opens every door in the Citadel, mostly by removing it.

+106 Attack
+24 Melee power
+4.5% Critical chance
+6% Gold find
Master Key: Your hits put Armor Break (25%) on their target, 13% of the time rolls Your hits put Armor Break (25%) on their target, 10–16% of the time

A unique piece never rolls affixes: what you see is what it is. Its passives roll within the range shown.

Where to get it exact odds, as the server rolls them now

From	Where	Chance
Obsidian Warden	Obsidian Citadel	3%1 in 33 kills

Chances are per kill (or per boss kill, per climb, per raid won) for an ordinary hero; item find and events move them a little. A tuned tag means staff changed the number from the book.