Operation Sector 3-15 (Underground Waterway) Boss Walkthrough
Sector 3-15 boss Void Fallen (Moon Striker, CP 5,288) walkthrough: breaking Void Shield, Star-attribute advantage (`Star -> Moon`), and unlocking Star Link & Flashpoint.
Void Fallen (3-15) Void Shield Mechanics & Recommended Party
Sector 3 (Stages 3-1 to 3-15, Recommended CP 3,954–5,288) shifts all enemies to Moon attribute, led by Void Fallen (HP 8,424, Moon Striker, Toughness 7) and Worshipper adds (HP 1,716, Moon Caster, Toughness 3). Void Fallen begins battle with its AoE Ultimate ("Void Indwelling") ready, granting itself an unremovable Max-HP-scaling Void Shield that stacks +6% ATK per turn (up to 5x) and +30% Basic DMG while active.
Because Star beats Moon (`Star -> Moon`), Star Defenders and Attackers like Haydee, Besta, Asherah, Clarissa, and Naru at Lv.20+ shred Void Shield quickly and absorb Bleed slashes cleanly. Clearing Sector 3-15 unlocks Star Link (level synchro!), Flashpoint, and Exploration Request Stage 2!
