Bianca upgrades

Varric's famous crossbow upgrades differently in each game.

Dragon Age II
Bianca is the only weapon Varric can use in-game and it cannot be unequipped. However, Bianca automatically levels as Varric does. So, the higher level Varric is, the stronger this crossbow becomes.

Dragon Age Inquisition
Bianca can be physically and visually upgraded like most weapons. Unlike in Dragon Age II, the weapon does not improve with level, but can be upgraded more than any other weapon with three types of upgrade pieces unique to it: arms, grips, and aiming modules. Runes can also be added to Bianca however they are not specific to Bianca and are therefore dealt with on the Runes (Inquisition) page.

Bianca can be unequipped and replaced with two daggers. Despite this, however, Varric is still the only one the weapon can be equipped to and it cannot be sold.

Crafted upgrades
There are a number of schematics that can be found throughout the game to upgrade Bianca. See crafting for general crafting information.