Emergency Door

The Emergency Door is a deployable skill which deploys a ghostly purple door. It is similar to the regular wooden door behavior-wise.

Location
The blueprint for the Emergency Door is located in the Slumbering Sanctuary, in a lore room.

The room does not always spawn, so it may require multiple runs to find. It stops spawning after the blueprint is turned in to The Collector.

Once in the room, a sign will ask you to prove if you are worthy (for an obscure task).

The entire passage is riddled with huge quantities of doors. The player must then reach the other end of the room without breaking any of the doors present (Doors outside of this room don't count). After reaching the end, there will be another sign. If done correctly, interacting the sign will cause it to say "You have proven your worth." The game will then spawn the blueprint for the skill.

If the player breaks any of the doors, the sign at the end will read, “You are not worthy” and not drop the blueprint. The character will also give the middle finger to the sign if it reads “You are not worthy” and thumbs up if it reads “You have proved your worth”.

Trivia

 * Emergency door may be a reference to a popular children anime, Doraemon, specifically the gadget Anywhere Door.