Building" story arc, but Simonson's interpretation of the character was unaware of certain major changes at the time to the Fantastic Four. Later writers ignored Simonson's choices, retconning these story elements as an attempt by Doom to blame his own past failures on unruly robots. 2000s–2010s Writer Mark Waid sought to redefine Doctor Doom in the 2003 "Unthinkable" storyline (vol. 3 #66-70 & vol. 1 #500), by having him forsake technology and invest entirely in mysticism. The story took its title from the "unthinkable" act Doom had to perform to acquire this new magical might from a trio of demons: killing his first love, Valeria. With Valeria's flesh turned into new mystic leather armor, the story follows Doom as he imprisons Franklin Richards in Hell, captures Valeria's namesake, and succeeds in de-powering and imprisoning the Fantastic Four. He subsequently attempts to prove his superiority to Reed Richards by giving him the chance to find his way out of a prison that could only be escaped through magic, in the belief that Richards would fail to do so. With the aid of Doctor Strange, however, Richards learns to utilize magic on a basic level by accepting that he could not understand it and escapes. Richards proceeds to trick Doom into rejecting the demons, resulting in them dragging Doom to Hell. Doom remained trapped there until the events of the 2004 "Ragnarok" storyline in the pages of Thor, which resulted in Thor's hammer Mjolnir falling through dimensions and giving Doom a way out of Hell. In 2005 and 2006, Doom was featured in his own limited series entitled Books of Doom, a retelling of the origin story by Ed Brubaker. In an interview, Brubaker said the series was a way to elaborate on the earlier portions of Doom's life which had not been seen often in the comics. The series also set out to determine if Doctor Doom's path from troubled child to dictator was fated or if Doom's own faults led to his corruption — in essence, a nature versus nurture question; whether Doom could ever become a hero. Brubaker's version of Doom was heavily influenced by the original Lee/Kirby version; responding to a question if he would ever show Doom's face, Brubaker stated "[F]ollowing Kirby's example, I think it's better not to show it." The Mighty Avengers invaded Latveria, Von Doom's nation, due to his involvement in creating a chemical