Unlock Hindsight, Staff of Parthalan, and Hayder's Razor
In order to acquire this unique belt and its codex, sign up for the Dragon Age newsletter through Penny Arcade here (http://dragonage.bioware.com/da2/info/pennyarcade/) using the EA account you use for the game. You can get this belt along with the Staff of Parthalan as long as you sign up for the newsletter using both methods. For Hayder's Razor and its codex entry, simply beat the Dragon Age 2 demo while signed onto the same EA account. Find these and other unlockables in a chest in your uncle's house in Kirkwall:
Hindsight: +1 armor, +138 fire resistance, +138 nature resistance, enemies drop better equipment
Staff of Parthalan: 22 fire damage (30 dps), 1 rune slot, +2 magic, +24 mana/stamina, +13% fire damage.
Hayder's Razor: 18 physical damage (30 dps), 1 rune slot, +24 health, +24 mana/stamina, +5% chance to knock back