Mignolaversity: Hellboy in Hell #1 [Review] – Multiversity Comics
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Mignola looks back at 20 years of 'Hellboy'
Hellboy (character) | Hellboy Wiki | Fandom
Does Hellboy break his horns all the time to keep it from growing? Why does he keep doing it? Is it because his horns represent the end of the world? - Quora