Awakened One
The Awakened One is one of three Act 3 boss enemies with 300 HP in each of two phases (600 HP total). In Phase 1 it uses a variety of attacks and gains 2 Strength each time the player plays a Power card. At the end of Phase 1, it dies and immediately resurrects into Phase 2 with full HP, gaining Dark immunity. In Phase 2 it adds Cultist minions and uses more aggressive attacks.
The Awakened One's Power punishment mechanic means Power-heavy strategies are risky in Phase 1. Ideally, play all your Powers after Phase 2 begins (or minimize them in Phase 1) to avoid empowering it. Phase 2's Dark immunity means Dark Orb-based Defect builds lose their primary damage source. The fight rewards flexible decks that do not rely on a single damage type and can sustain through two full HP bars.