Notes
They may look rather harmless but do not underestimate this fearsome creature. Usually avoided in mines due to the fact it has very high hitpoints, so it takes a longer time to kill, increasing the chance of being swarmed by respawns of other creatures. After the Updates/8.5, their hp was lowered from 8500 to 5800.
Abilities
Melee (0-420), Death Beam (0-210), Paralyzing Death UE.
Damage Taken From Elements
Location
Pits of Inferno, Formorgar Mines, Helheim and in The Arcanum (Part of the Inquisition quest).
Strategy
Though dangerous, they aren't overly powerful so a decent blocker with decent skills will suffice to keep Lost Soul at bay. However, they can retarget a lot so any shooters from the back row should keep their guard up at all times. You should try to trap them in somewhere, since they run at low health and can be seen in dangerous places with more monsters...
Loot
0-320 gp, 0-3 Platinum Coins, Torch, 0-2 Rotten Meat, Blank Rune, Bone, Soul Orb, Plate Armor, Scale Armor, Steel Helmet, Demonic Essence, Silver Goblet, Unholy Bone, Rusty Armor (Semi-Rare), Rusty Armor (Rare) (semi-rare), Titan Axe (semi-rare), Great Mana Potion (rare), Ruby Necklace (rare), Death Ring (rare), Skeleton Decoration (rare), Broken Key Ring (rare), Stone Skin Amulet (rare), Skull Staff (rare), Amulet of Loss (very rare),Tin Key (very rare), Legion Helmet (very rare).