Shadow Creatures that spawn when nearing insanity/insane, in addition to being affected by explosive weapons when the players are still sane, can also take fire damage. This shouldn't be the case since they're not affected by other things like Tooth Traps or bosses' AoE attacks.
Steps to Reproduce
Light a mini forest with tightly planted trees on fire and stand in it with an Obsidian Armor while insane. Watch the Shadows die to fire.
Light a mini forest with tightly planted trees on fire and stand in it with an Obsidian Armor while insane. Watch the Shadows die to fire.