Marvel NOW! Tony's hunt for Extremis takes him to the ancient Catacombs of Paris where absolute horror awaits! Things man was not meant to know Vs. the man who wants to know everything. Plus, the new Iron Man heavy-duty battle-suit debuts.

• Colorist : Guru-eFX
• Letterer : Joe Caramagna

Variants cover

Iron Man (2012) #4 (2nd Printing Variant)

Iron Man (2012) #4 (Pagulayan Design Variant)

Iron Man (2012) #4 (Deodato Variant)