Undercroft

The Undercroft is the lowest level of the Warbringer's Tower in Ruins of Wrath, home to the miniboss Scoroboth, Son of Xivu Arath. To open the tower, defend the glowing Hive plate at its base from Hive waves starting at beacon #1, then follow the Toland Orb inside. The halls contain exploding traps.

Scoroboth

Scoroboth's shield can only be broken with three relics scattered around the level. Each relic you throw at him removes about a third of his health and makes him retreat, so you follow him down through each new level to the next relic.

Harrowed Hall

The Harrowed Hall chest (Enigmatic Mystery) sits beside the first relic used to strip Scoroboth's shield. Activate the True Sight marker in the previous room to reveal it.