Ferrous Butterfly (BB)

Beautiful but deadly, the ferrous butterfly is a turkey-sized insectile creature bristling with dozens of gleaming, razor-edged blades. Considered harmless by most denizens of the Plane of Metal, they nonetheless pose a significant threat to organic creatures, whose iron-rich blood they find irresistible. The wing blades of these butterflies tend to break off during feeding and regrow naturally. These scales are reminiscent of jagged scraps of metal and can serve as surprisingly effective makeshift weapon.