Lava child

Lava children were creatures native to the Fountains of Creation. They were known for being very territorial, and were all born identical to one another, with a permanent smile on their faces.

Description
A remarkably distinctive quality of lava children was their immunity to metal. They could freely pass through any type of metal as if it did not exist, and were also immune to attacks from weapons made of any metal.

Society
Lava children were first born from the merging of spirits of earth and fire. They were able to procreate by themselves upon reaching adulthood, whereupon they laid their eggs in pools of magma.

Appearances

 * Waterdeep: Dungeon of the Mad Mage