Benighted Lost is an unlockable character in Benighted Soul, a mod for The Binding of Isaac.

Chest Chest (Consumable slot)
Chest
A random chest (Finishing Keys are Bomb required)

No Heart character.

Familiar items are removed from pools.

Hold drop key to open a chest.

Flight.

Spectral tears.

min(50, 10+ 4 × luck)% chance to fire key tears with +1 damage.
(same as Sharp Key)

Can attack at any direction (same as Analog Stick).

nolostbr items and some items would be decomposed into 1 + 2 ^ quality keys, and spawns chest for Q2-or-above items.

Hold use active key of Chest Chest to transform chests into weapons/armors/floats or repair them.

Attention: If find a item from a chest, then the chest is not truely chest, but pedestal.

(Detail in GuruWiki)

Play as The Lost / Tainted Lost, die from Mulliboom at stage 1, a bomb at stage 3, Mom at stage 6 and Satan at stage 10 (Fixed sequence; Needn't in just a run).

The following special synergies and interactions for Benighted Lost have been documented.

* Note that not all possible synergies and interactions are listed here.

nolostbr items and items below will be de decomposed into 1 + 2 ^ quality keys:
• Magneto
• Dad's Key
• BFFS!
• Box of Friends
• Sacrificial Altar
• Sharp Key
• Magic Skin
• Esau Jr.

Specially, for items whose quality is 2 or above, spawns chest:
• Quality 2: Random chest.
• Quality 3: Rare chest.
• Quality 4: Rare chest + random chest.

Rare Chest:
• Wooden Chest (34%)
• Red Chest (31%)
• Eternal Chest (21%)
• Old Chest (13%)
• Mega Chest (1%) Chest Chest transforms chests into weapons / armors/ floats, with "Durability".

Opened chest transformed will start with a much lower durability:
• Bomb Chest: 50% init.
• Weapon / Float：15% init.
• Armor: 50% init.
• opened Wooden Chest can not be armor.

Chest weapons inherit tear effects from the character.

In an uncleared room with enemies, the durability of the chest weapons and floats will decrease per second.

Armors will decrease therir durability to protect character from taking damage.

In Greed Mode, except Eternal Chest, chest weapons and floats have 50% chance not to decrease their durability.



Chest:
• Weapon:
Durability 100, init 75.
Fires big split key tears.

• Armor:
Durability 2.
1.5s invincible time.
+ 0.15 speed.

• Float:
Durability 75, init 60.
Count 2, orbitals.
Fires key shielded tears to projectiles or enemies.


Bomb Chest (Unrepairable):
• Weapon:
Durability 210.
Fires 8 scattering tears in short distance twice, with small shockwave.

• Armor:
Durability 6.
1.5s invincible time.
- 0.15 speed.

• Float:
Durability 180.
Count 2, orbitals that block projectiles.
Spawns a Golden Chest item and a trinket when exhausted.


Spiked Chest / Mimic Chest:
• Weapon:
Durability 111, init 88.
Rushes at a direction with collision damage, during which block projectiles and fire tears to enemies.
Comes back when the charge is run out or touch the border of the room.

• Armor:
Durability 2.
4s invincible time.
Every frame, deals 1 damage to enemies nearby.

• Float:
Durability 90.
Count 3, followers that block projectiles.
Deals collision damage.


Eternal Chest (Won't disappear when durability exhausted):
• Weapon:
Durability 70, init 35.
50% chance not to decrease durability.
Fires 8 widely scattering holy piercing bouncing tears.
Clears charge at a new room.

• Armor:
Durability 4, init 2.
25% chance not to decrease durability.
1.1s invincible time.

• Float:
Durability 70, init 35.
50% chance not to decrease durability.
Stays at the center of the room.
Fires piercing holy shielded tears to 4 at most projectiles or enemies.


Old Chest (Durability decreases at any time):
• Weapon:
Durability 109.
Recovers 2 durability when killing enemies, and 8 more for killed bosses.
Fires 3 bones at a high speed, and overheat if keep attacking for a while.
Can not attack during overheat.

• Armor:
Durability 4, init 2.
Loses 1 durability per 19s until 1 left.
Recovers 0.05 durability when killing enemies, and 1 more for killed bosses.
1.7s invincible time.

• Float:
Durability 88.
Recovers 2 durability when killing enemies, and 8 more for killed bosses.
Count 4, move diagonally.
Fires shielded bones to 3 at most projectiles or enemies.


Wooden Chest (Unrepairable):
• Weapon:
Durability 90.
Recovers 3 durability when a room is cleared; Full durability next level.
Fires 3 blue flames.

• Armor:
Durability 2.
Full durability when entering another room or a room is cleared.
0.7s invincible time.

• Float:
Durability 75.
Recovers 3 durability when a room is cleared; Full durability next level.
Count 2, orbitals that block projectiles.
Deals collision damage.
Spawns blue flames when touching projectiles or enemies.


Mega Chest (Armor only):
• Armor:
Durability 5, init 3.
0.5s invincible time.
- 0.2 speed.
Can recover durability by absorbing chests.
Absorbing a type of chest for the first time increases max durability and invincible time but decrease speed.


Haunted Chest (Becomes Chest one when exhausted):
• Weapon:
Durability 45.
Fires C Section tears.

• Armor:
Trigger Holy Card when equipped.
Durability 1.
0.5s invincible time.
Basic damage multiplier increases to 130%.
Items that will be decomposed have an extra option in cycle.

• Float:
Durability 60.
Count 2, orbitals.
Spawns lil ghosts against enemies (same as Ghost Bombs).


Locked Chest:
• Weapon:
Durability 140, init 90.
Fire short small lasers when charing.
Fires a big laser when fully charged.

• Armor:
Durability 3, init 2.
1s invincible time.
+ 7 luck.

• Float:
Durability 120, init 75.
Orbital.
Fires shielded lasers to 3 at most projectiles or enemies.


Red Chest (Can only be repaired by heart pickups):
• Weapon:
Durability 123, init 66.
Fire short Brimstone.

• Armor:
Durability 6, init 2.
1.3s invincible time.
+ 6% damage this level for every time block damage.

• Float:
Durability 99, init 66.
Orbitals.
Orbit a enemy and conjure magic circles of Black Powder.
The enemy gets Brimstone Mark.


Mom's Chest (Armor only; Unrepairable):
• Armor:
Durability 9.
0.7s invincible time.
The durability of chest weapons and floats become infinite. The lower durability of a chest, the longer to repair it takes, and the more cost.

Loss Percent: LostDurability / MaxDurability.

Time (second):
• Weapon / Float: max(0.5, 5 × LossPercent).
• Armor: 2 × MaxDurability.
• With Birthright, 2x speed.
• In a cleared room, 4x speed; With Birthright, 5x speed.

Key Cost (The part that is less than 1 is counted as 1; "P" is ChestMultiplier × LossPercent):
• Weapon: 2P
• Armor: 3P
• Float: 1.5P

Chest multiplier:
• Chest: 0.7
• Spiked Chest / Mimic Chest : 1
• Mega Chest: 4
• Haunted Chest: 0.5
• Eternal Chest: 1.7
• Old Chest: 2
• Locked Chest: 1.25

Red Chest heart durability value:
• Heart: 4
• Heart (half): 2
• Heart (soul): 6
• Heart (eternal): 14
• Heart (double): 8
• Black Heart: 13
• Gold Heart: 12
• Heart (half soul): 3
• Scared Heart: 5
• Blended Heart: 12
• Bone Heart: 12
• Rotten Heart: 5

Mega Chest chest durability value:
• Mega Chest / Mom's Chest: Full durability
• Closed Chest: 1
• Opened Chest: 0.4 To unlock below, must play on Hard Mode.

• Heart: Treasure Key
• Isaac: Wildering Mirror
• ???: The Horned-Axe
• Satan: Moon Streets
• Lamb: AKEY-47
• Mega Satan: Brother Albern Truth Chest
• Boss Rush: Odd Key
• Hush: Falsehood of the Lost
• Delirium: Chest Chest
• Mother: Neopolitan
• Beast: Knock
• Greed: Fomalhaut
• FINISHED: The Silver Key Isaac died in a chest.

Compare with a traditional ghost, The Lost can not haunt objects, while Benighted Lost makes up for this.

The way to unlock Benighted Lost is a reference to The Lost in early version.

• Download Benighted Soul from the Steam Workshop.