| Bosses |
| Chapter 1 | Chapter 2 | Chapter 3 | Chapter 4 | Chapter 5 | Chapter 6 |
| Harbingers | Alternate Bosses | Universal | Devil and Angel Room | Seven Deadly Sins | All Mini-Bosses | All Bosses |
The Harbingers are a group of hobbyhorse riding bosses that are unlocked by defeating Mom for the first time.
Harbingers
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| Famine |
Pestilence |
War |
Death |
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| Conquest |
Headless Horseman | ||
The Ultra Harbingers
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The Ultra Harbingers are a team of stronger forms of The Harbingers. The team comprises of the main four harbingers without the alternatives of Conquest, or Headless Horseman. They are fought one at a time prior to fighting The Beast.
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| Ultra Famine |
Ultra Pestilence |
Ultra War |
Ultra Death |









