Collects Journey into Mystery (1952) #632-636.
*The Ultimate Power, Trapped in Loki's Mind! Once Asgard's greatest villain, Loki has been reborn as a child in search of redemption. But a darkness is spreading throughout Loki's mind, and with it an unbridled power that could be harnessed for good or evil. When children around the world begin falling into states of perpetual nightmare, son of Satan Daimon Hellstrom follows the trail to Broxton, Oklahoma, and Loki. Hellstrom and Loki journey deep into the child-god's mind in search of the source of the worldwide epidemic of nightmares and find a formidable fear entity intent on unleashing this dark power on the world! *Source: back of book