Defeat the Entombed Sentinels after each Sentinel uses Vitriolic Stasis to restore more than half its total health in The Venomous Abyss on Normal difficulty or higher.
Disrupt both the Broken Throne and Daggerspine Point Ritual Sites on Tier 6 with all 8 challenges active.
This achievement will become a Feat of Strength at the end of Midnight.