Pure Nail

The  is a melee weapon which can attack in different directions depending on player movement input. Vertical attacks deal damage.

It is based on weapons from the game Hollow Knight.

Location
In the Prisoners' Quarters, there is a chance for a lore room to spawn with a bench in it. When examining the bench, the nail drops. Picking it up will unlock it permanently.
 * "This place feels so... peaceful."
 * "I feel like sitting on it would be a great relief."
 * "It's good to be right."

Trivia

 * This weapon is a reference to the Pure Nail - the fully upgraded form of the main weapon in Hollow Knight.
 * The weapon's flavor text refers to one of the lines of the Nailsmith, the creator of the Pure Nail.
 * The location of the weapon is also a reference to the save point benches in Hollow Knight.