Here's how to unlock the Underroot Dungeon in Diablo 4 and get Aspect of the Expectant.
Underroot Diablo 4 Dungeon Guide - D4
Diablo 4: How to find and access Underroot Dungeon
Diablo 4 Dungeons - A Complete Guide of all Dungeons in Diablo 4
Page 277 – PC Invasion
Diablo 4 Underroot Dungeon Location, Boss, Rewards, More - GINX TV
Diablo 4: All Dungeon Locations in Scosglen (& The Aspects They
How to Find and Enter the Echo of Hatred Capstone Dungeon in Diablo 4
How to Find and Enter the Echo of Hatred Capstone Dungeon in Diablo 4
Diablo 4 Underroot Dungeon Guide - Wowhead
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How to unlock high-tier Nightmare Dungeons in Diablo 4 - Polygon
Underroot - Diablo IV Database
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