Time Stamps 0:00 - His exact location 0:36 - Reward 1 for 10 pieces, Unlocks Nickname change at Vine Center 0:59 - Reward 2 for 20 pieces, The demon, Sytympldes 1:57 - Reward 3 for 30 pieces, The demon, Nue 2:56 - Reward 4 for 40 pieces, Unlocks the B Class at Battle Net 3:58 - The final reward for 50 pieces, The demon, Sariel Note: There are 66 total Magnetite throughout the game. So you have 16 Magnetite that are just there to make sure you get the rewards.