Living Fire Blocks

The Living Fire Block is a type of block dropped by any monster while it's in the Underworld during Hardmode at a 1/50 (2%) chance. It drops in stacks of 20-50. When placed it looks like a burning fire and emits a faint orange light, but deals no damage. Although it's a block it's also a background object, making it more of a decorative furniture item than a building material. Like other blocks it can be broken with a pickaxe.