Assertion: ghost's power | /r/AtLocation | world war hulk
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text: The demonic entity Zarathos, which is the current source of Ghost Rider's power, has been described by Doctor Strange (the Sorcerer Supreme of Earth, whom the Rider overpowered once in direct combat) to possess sufficient mystical power to challenge the Green Scar incarnation of the Hulk, as shown in World War Hulk.