Binding of Isaac: Rebirth Wiki
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(in Repentance)

Seeing Double is challenge #40. The goal is to defeat Boss Mom's Heart ingameMom's Heart. This challenge is unlocked by defeating Boss Mother secondphase ingameMother.

Difficulty[ | ]

Otherwise a very standard run, the challenge comes from every enemy and boss placed naturally in rooms (as opposed to being spawned later) being doubled. Due to the high enemy density, damage may prove difficult to avoid in some rooms. It is recommended for oneself to be already familiar with the gameplay of Character Jacob and Esau iconJacob and Esau prior to attempting this challenge.

Strategy[ | ]

  • Room clearing items like Collectible Toxic Shock iconToxic Shock and items synergizing well with Collectible 20 20 icon20/20 such as Collectible Jacob's Ladder iconJacob's Ladder can be incredibly useful.
    • Collectible Toxic Shock iconToxic Shock will only damage the original enemies in rooms, the doubled enemies that spawn will not take any damage.
  • As Esau begins the challenge with Collectible X-Ray Vision iconX-Ray Vision, Secret RoomSecret Rooms are instantly revealed, which may provide Jacob and Esau with helpful resources.
  • As Libraries are able to spawn in this challenge, they can be a valuable resource. Collectible The Bible iconThe Bible can help with protecting one of the brothers as well as instantly killing both Boss Mom ingameMom and Boss Mom's Heart ingameMom's Heart, Collectible Book of Virtues iconBook of Virtues will create helpful wisps in combination with other books (e.g. Collectible Book of Shadows iconBook of Shadows), and Collectible Book of Revelations iconBook of Revelations will help sustain either brother's health.
  • It may be wise to keep Silver DollarSilver Dollar if found, as the Shops it will spawn in Chapter 4 can be incredibly useful.
  • Collectible Eraser iconEraser is an extremely powerful item for this challenge that can be found in Shops, as permanently erasing common enemies can help tremendously.
  • Mapping effects such as Collectible The Compass iconThe Compass or Collectible The Mind iconThe Mind can help quickly navigate through levels and avoid unnecessary risks.
  • Teleportation items such as 0 - The Fool0 - The Fool, Collectible Teleport! iconTeleport!, or Telepills can be used to quickly escape dangerous situations or skip rooms altogether. Collectible Glowing Hourglass iconGlowing Hourglass may also be used to return to the previous room and revert any possible health loss.
  • Room clearing effects are particularly powerful in this challenge:
    • Collectible The Necronomicon iconThe Necronomicon/XIII - DeathXIII - Death will instantly clear more dangerous rooms.
    • The Ace of HeartsAce of Hearts and other Ace cards will instantly clear rooms with large amounts of monsters, producing numerous pickups in the process.
    • II - The High PriestessII - The High Priestess can be an effective boss killer, greatly damaging or eliminating one or both bosses.
    • Chaos CardChaos Card, if thrown correctly, can instantly kill numerous troublesome bosses and enemies in a single throw.
  • Enemies and bosses in Challenge RoomChallenge Rooms are not doubled, as they are not spawned when Jacob and Esau initially enters the room. This makes it worth considering to clear them for extra pickups and items.

Notes[ | ]

Reward[ | ]


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