Red Key

Red Key is an unlockable active item.

Effects

 * While held, a red outline of a door will appear on walls which a Red Key can be used on.
 * Approaching one of these outlines and activating the item creates a door that leads to a red room.
 * The red room can be several types of rooms, including but not limited to:
 * Regular enemy rooms
 * Shops
 * Arcades
 * Sacrifice Rooms
 * Secret Rooms
 * Curse Rooms
 * Bedrooms
 * Treasure Rooms
 * Vaults
 * Libraries
 * Dice Rooms
 * Devil Rooms
 * Angel Rooms
 * I AM ERROR Rooms
 * Planetariums

Seeds
JABM M6NE - Curse room next to spawn

T26E CR6B - Curse room next to spawn

9J99 2YMW- Curse room next to spawn

2ZX3 XKBQ - First-floor curse room

8EMD 1ASP - First-floor curse room

BZP1 7KLB - First-floor curse room

9FTC V9SK - Right red chest in first-floor curse room, if rerolled twice

2VPF Q402 - Eden spawns with this item.

9B6C 8TWY - Curse room next to spawn

78WE 8GWS - First-floor secret room, below spawn.

RNJL KHXY - Curse room next to spawn, re-roll the goat head into it.

Trivia

 * This item may be a reference to red rooms. Red rooms are an internet urban legend originating from the Deep Web, allegedly being hidden websites or services where viewers may pay money to torture or kill innocent victims.
 * This item may be a reference to the item of the same name in the RPGMaker Game LISA: The First, in which it is used to access a red basement.
 * In Repentance, this item's unlock method was changed to reaching Home and opening the chest in Mom's room. It is also vital for unlocked the Tainted characters. Its original unlock method is referenced by Soul of Cain, which allows for a single-use Red Key effect on every available door.