20 sources Arkham Asylum: Living HellThe Atom and Hawkman #46 (Mar. 2010): "Bye Bye Birdie!" Challengers of the Unknown (vol. 3) #15 (Apr. 1998): "Earth Came A-Walkin'" The Savage Dragon (vol. 2) #104 (Oct. 2002): "Savage Dragon" The Spectre Spider-Man Unlimited (vol. 3) #8 (May 2005): "Everything" X-Factor | 6 characters
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