Luke Cage breaks into the Baxter Building, but the Fantastic Four are at the ready! A battle ensues, but once Cage explains his mission to receive payment from Dr. Doom, Reed Richards gives him an aircraft to fly to Latveria! Cage embarks on his quest to Castle Doom.

Luke Cage hunts down Doctor Doom, and forces him to pay what he owes. Showdown With Dr. Doom!

This specific comic has Luke Cage taking on Doctor Doom, and defeating him all on his own. During the times, that raised a lot of complaint from white society due to Cage's ethnicity. This comic is definitely one for the ages.