Lazarus
ReadyHave 4 or more soul hearts at the same time.
Achievement
Use Pandora's Box in the Dark Room.
In-game: “Unlocked a new item.”
Sources:AchievementsDark Room
Have 4 or more soul hearts at the same time.
Defeat Mom.
Reach Depths II and defeat Mom.
Sources:AchievementsWomb
Defeat Satan 5 times.
After: The Womb
Defeat The Lamb as Lazarus.
After: Lazarus, The Womb, The Negative
Use Pandora's Box in the Dark Room.
After: Pandora's Box, The Womb, The Negative