Black Iron Tarkus

Black Iron Tarkus is a character in Dark Souls. He can be summoned by the player in the fight against the Iron Golem boss in Sen's Fortress.

Location
In a structure at the end of the walkway leading out of the room from where the fog door to the Iron Golem is located. Like other summon signs, Tarkus' summon sign is only visible if the player has not put down a summon sign and is in Human form. His sign is partially hidden under a table.

Plot
Tarkus aids the player in taking on the Iron Golem as a White Phantom. He is incredibly tough and can even solo the Iron Golem in New Game, and provides a great distraction.

His Greatsword, Black Iron Greatshield and armor, the Black Iron Set, are found on a corpse in Anor Londo, next to the entrance to the Painted World of Ariamis.

Lore
Black Iron Tarkus is most likely a knight from the realm of Berenike, and renowned even among his people for his great strength. According to the Crestfallen Merchant, Black Iron Tarkus met his doom while attempting to visit Anor Londo.