Talk:Illuminant Bat/@comment-24.99.29.90-20111213021717/@comment-68.75.81.225-20120518131941

@Superguy163 You must have been near enough to an Underground Hallowed Biome. I've killed demons and other underworld creatures, as well eaters and other corruption biome monsters that dropped souls of light simply because they followed me to an underground hallowed biome. So it's definitely the biome, not the monster.