Carta Key is a plot item and key in Dragon Age: Origins.
Acquisition[]
Looted from Jarvia's corpse in the Carta Hideout at the climax of the Entering Jarvia's Hideout questline.
Involvement[]
Opens the metal door in the back of the room where the encounter with Jarvia occurs. This leads up into Janar Armorers in the Orzammar Commons.