The Witness

The Witness
Base HP
First phase: 2500 Second phase: 2500
Stage HP
0
Found In
Corpse
Dropped Items

The Witness is a new final boss introduced in Antibirth.

Behavior

The Witness has two phases. In its first phase, it is attached to the upper wall and has several attacks:

• Fires 3 lines of red tears that follow Isaac which burst when hitting a wall.
• Shoots 2 parallel lasers from its right eye after it spawns rocks in random places for Isaac to stay behind
• Smashes one of its fists and spawns rock waves that travel outwards
  • This move is only used to erase rocks formed by the sweeping laser attack.
• Smashes one of its fists and spawns a ring of 10 tears that split.
• Spawns multiple Corpse Eaters from its right hand.
• Fires a cluster of bullets at Isaac that slightly homes and splits into 5 smaller versions upon contact with a wall. The smaller versions home in as well and burst into a random cluster of bullets upon hitting a wall or after a certain amount of time.
• Spits a cluster of blood shots with 3 larger tears that stick in the ground and periodically shoot 6 shots.
  • These tears can be destroyed, and will continue to fire shots until they are destroyed.
• Throws a massive knife leaving a trail of bullets. Bullets explode from the location the knife impacts the wall, and the trail of bullets splits horizontally in both directions.
• Spits a ball of blood that will bounce off of the wall and back to it. It will then smack the ball back at the player. The ball will bounce between The Witness and the far wall several times, increasing its speed each time it bounces.
• Smashes its fists to spawn moving rows of tears along with rows of tears that travel in lightning patterns.

Once the first phase's health is depleted, it will detach from the wall and begin roaming around the room with new attacks:

• Spawns tears at an edge of the room, which then create lines of tears across the room after a short delay
• Charges at Isaac, leaving behind portals that attract tears
• At low health, it fires a large tear that then transforms into a rotating brimstone beam
• Spins around in place, simultaneously firing 5 rotating rows of bullets and rings of 20 bullets. Each ring alternates between rotating clockwise and counterclockwise.

Notes

• The Witness's second form is resistant against the Midas' Touch stun effect, even though he does change color to golden.

Unlockables

• Jacob & Esau - Defeat The Witness for the first time.
• Meat Cleaver - Defeat The Witness as Isaac.
• Yuck Heart - Defeat The Witness as Magdalene.
• Red Key - Defeat The Witness as Cain.
• Akeldama - Defeat The Witness as Judas.
• Eternal D6 - Defeat The Witness as ???.
• Bird Cage - Defeat The Witness as Eve.
• Donkey Jawbone - Defeat The Witness as Samson.
• Devil's Crown - Defeat The Witness as Azazel.
• Tinytoma - Defeat The Witness as Lazarus.
• 'M - Defeat The Witness as Eden.
• Lost Soul - Defeat The Witness as The Lost.
• Revelation (currently bugged, unlocks nothing) - Defeat The Witness as Bethany.
• Magic Skin - Defeat The Witness as Jacob & Esau.

Gallery

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  First phase

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  Second phase

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  Ingame Sprite

Trivia

• The name may be a reference to a murder victim, as you killed your own mother's heart much earlier to unlock the boss, and it could have possibly been watching.
• The design of the Witness is a possible nod to a rumor that began close to Rebirth's release, the Ur-Gurdy, a gigantic form of Gurdy that would act as a boss in Sheol.
  • The Witness might also be a dead or upgraded version of Mama Gurdy, as they have many similarities.

Bugs

Bug! After beating The Witness with a character, there will be a chance for The Witness to spawn randomly on any floor while playing that character.

Bug! The chest may spawn inside The Witness after defeating it which causes it to become unreachable. This can be fixed by exiting and resuming the current game.

Bug! After defeating the Witness, there is a small chance that the endgame chest may not spawn; Instead, an item from the boss pool will spawn. In this case the run cannot be completed.

Bug! Killing the first stage of The Witness in a short period of time (e.g. using the Chaos Card) may prevent the second stage from spawning. This can be fixed by exiting and resuming the current game, which restart the battle.

Bug! Defeating The Witness in a really short amount of time may crash the game.

Bug! Beating The Witness while the spinning Brimstone attack is still active prevents the boss battle music from stopping.

Bug! If The Witness is killed during its spinning attack, the spinning sound will play after the battle and in the ending cutscene.

Bug! If you use the Joker Card during or after the battle, you will either go to an Angel room or Devil room leading to Sheol. If you enter the boss room on Sheol, you will encounter a normal boss instead of Satan, and after defeating the boss, no chest will spawn, making you stuck.