Amulet of Martial Determination

The Amulet of Martial Determination is DLC that came as part of AMD Radeon™ In-Game Gift Pack.

Official description
Uniquely enchanted to enhance and optimize ability.

Acquisition
The amulet can be acquired after the events of the prologue, when the Inquisitor is awoken by an elven servant. It is located on a chest named "Special Deliveries".