Complex sentence: Dreiberg (as Nite Owl) met fellow costumed adventurer Rorschach who suggested they partner to take on organized crime, the two became, not only a team, but also best friends.
Split into simpler sentences: Dreiberg (as Nite Owl) met fellow costumed adventurer Rorschach, who suggested they partner to take on organized crime. The two became, not only a team, but also best friends.