Lyekurn's Diary

Lyekurn's Diary was a Legendary Crafting Material in Diablo III. It requires a Character Level of 1 to use, is account bound, and may be stacked up to 1000 times. It was required for the crafting of the Corruption legendary pauldrons. As of patch 2.0.6., it no longer drops, and existing Diaries may be sold for 50,000 Gold.

The item only dropped from Azmodan himself.

''"Azmodan tasked his minions with stealing Lyekurn's armor and diary, and with killing him in order to keep anyone from implementing his methods of siphoning Azmodan’s power." — Demonicus de Zoltun Kulle''