Mechanic Voodoo Doll

The Mechanical Guide Doll is a summoning item for the Wall of Steel. When it falls into lava in the Underworld, the Wall of Steel will spawn. It is crafted with 20 Souls of Might, 20 Souls of Fright, 20 Souls of Sight, a Guide Voodoo Doll, 2 Mechanical Eyes, 1 Mechanical Skull and 30 Iron Bars. One dropped into lava, the Guide will die.