30 Iconic Comics All Batman Fans Must Own

12. Batman #232

This single issue from 1971 was the first appearance of Ra's Al Ghul.

Ra's has gone on to become one of Batman's most formidable foes, as their ideological battle continues to this day. Ra's is every bit as good a combatant as Batman and also has vast resources, an army of followers and a gifted intellect to utilise.