Find the Relic within Diablo 4 Items the Sunken Library

Location: Sunken Library (Kehjistan, near Iron Wolves Encampment)
Objective: Defeat the Archival Guardian and recover the next relic.

Enter the Sunken Library and proceed through the dungeon. After the first branching path, head right. On your minimap, a red skull icon will mark the location of a mini-boss: the Archival Guardian. Defeat this enemy to obtain:

Letter to Iben Fahd (not a relic, but essential to the story)

This serves more as a lore piece and a pointer to the next quest phase, but it's part of the sequence to progress.

3. Speak with the Villagers about Relics

Location: Firebreak Manor
NPC: Finch

Teleport to Firebreak Manor and talk to Finch. He will mention the final relic's whereabouts, pointing you toward Mercy's Reach, a dungeon that will soon become very familiar.

4. Find the Relic within Mercy's Reach

Location: Mercy's Reach (Hawezar)
Path: Enter - South - Northeast at first junction - Southeast at second junction

Inside Mercy's Reach, make your way through the winding tunnels until you encounter Rograk and Takral, a deadly pair of Knight Hunters. These minibosses protect the final relic.

Defeating one of them will drop:

Zakarum Emblem (Relic #3)

Be sure to buy Diablo IV Items loot it before exiting the dungeon.