Unlocks the passageway to ??? and the Hush fight, regardless of the run duration. Using Pandora's Box grants it a special effect, consuming the key.
Quote
"What could it open?"
Effects
- Unlocks the passageway to ???, regardless of run duration.
- Unlocks Pandora's Box, giving it a new effect.
- The normal effect of Pandora's Box for that level is ignored, and instead 6 items from random pools are spawned.
- Both the box and the trinket are consumed.
