Amazing Spider-Man #656 (2011)

If Spider-Man hopes to find a way to defeat his new nemesis Massacre, he'll need the help of his all new, all-power costume! But will protecting the people of New York mean that Spider-Man finally takes the last measure-- killing a bloodthirsty madman when there are no other options? Will Spider-Man be forced to break his number one rule? Written by Dan Slott, art/cover by Marcos Martin.

Key book; debut of Spider-Man's Armor MK II, origin of Massacre (Marcus Lyman). Near mint condition.