High Kaliber

High Kaliber is a gun that was added in the A Farewell to Arms update.

The gun fires a shot, which upon hitting an enemy, marks the enemy and causes the enemy's soul to leave its body. The soul will despawn after a short amount of time, if it hits a wall, or if a blank is used. If the player comes into contact with this soul, the enemy takes massive damage. Soul collection kills non-boss enemies instantly, and deals 55 damage to bosses. Additionally, all other marked enemies in the room take 5 damage.

The gun takes 6 ammo per shot, effectively having an ammo capacity of 111.

Trivia

 * You can kill the Gunreaper by shooting once and taking his soul. You cannot, though, kill the Lord of the Jammed with it, as the bullets just phase through it.
 * The synergy is most likely a reference to the term "ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn" of the H.P Lovecraft story "Call of Cthulhu".
 * This gun is most likely a dual reference to both Soulcalibur, a fighting game series featuring a demonic blade that turns its host into a nightmarish abomination similar to what the Entry physically describes the gun as, and Soul Reaver, a spinoff game from the Legacy of Kain series starring an undead vampire that consumes the souls of his slain foes.
 * The damage done by stepping on enemies souls is known internally as 'Soul Burn'.
 * The maximum ammo of the High Kaliber (666) is a reference to the biblical Number of the beast (666).