"And Six Shall Crush the Hulk!"
Hulk faces an array of monsters from the hey-day of Atlas / Marvel fantasy comics: Diablo from Tales of Suspense (1959) #9, Taboo from Strange Tales (1951) #75, Groot from Tales to Astonish (1959) #13, Goom from Tales of Suspense (1959) #13, the Blip from Tales to Astonish (1959) #15, and finally, the organizing force behind them all, Xemnu the Living Titan (ironically, originally called 'The Hulk'), from Journey into Mystery (1952) #62.