Ruin's Descent

Ruin's Descent is the elevator at the entrance of the titan complex of Uldir. The bottom is part of the Underrot, and the leak through which G'huun's corruptions escapes his prison.
The Unbound Abomination is fought here in the Underrot, before finally being cleansed away by Titan Keeper Hezrel and a group of adventurers.
Later, Taloc is faced here during the descent into Uldir.