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Zenless Zone Zero Hollow Zero Guide: Withering Garden, Resonium, and How to Reach S-Rank

Hollow Zero is the roguelike buried in Zenless Zone Zero's endgame, and most players poke at it once and never go back. This guide explains the Withering Garden loop, how Resonium stacking actually wins runs, when to explore versus blitz, and how to hit S-Rank on the hardest difficulties for weekly Boopons and materials.