Complete the game as Dwingvatt
L1: Twin fang: Default. No bonus effects.
L2: Assassin's dagger: critical rate + 20% - Chest in Bastide of Varrgand. Path on way to temple.
L3: Devil tooth: Attack +40%, range +80%, Speed +20%, Orb gauge charge +50% - Ice gate. Destroy a lamp(torch) post. At the main Ice gate's ... well gate (last area) hug the fortress wall and go east until you hit the mountains. Now follow the mountains north past 2 sets of 2 large pillars. A very little bit further (still hugging the mountains) you should find this elusive lamp post in a small almost hidden alcove. Destroy it with Orb spark (blue gauge) it should be in the base of the ruined Post.
Khukuri: Attack and range +20%, critical rate +10% - Chest in Bastide of Varrgand. Dead end West of Temple.
L4: Black Scimitar: Attack +40% range +30% - Chest in Ice gate. N/E of gate 5.
L5: Nemesis: Attack +40%, Defense and Critical rate +50% - Chest in Castle of Varrvazzar mission. When you have to kill the king and his three sons, head east until you run into some REALLY thick fog. Hidden in the fog is a chest containing Nemesis.
L6: Hell's Dagger: Attack & guard break +50%, Critical +100% - Chest in Pholya Flatlands. Going south from the center of the map it's near some pillars. Or conversely, going north from where you rescue Dwykfarrio it's near some pillars.