Sentry

Robert Reynolds — the Sentry — stands as one of Marvel's most enigmatic and psychologically complex powerhouses. Introduced in Sentry #1 (2000) as part of a brilliantly constructed retcon, the character was presented as a forgotten Silver Age hero whose existence had been erased from the memories of the entire Marvel Universe, including his own. That debut issue is a must-have for collectors, arriving with a clever marketing campaign that blurred the lines between fiction and comic book history, making it feel like a genuine rediscovery rather than a brand-new creation. Paul Jenkins and Jae Lee crafted a character whose raw power — often described as the strength of a million exploding suns — was matched only by the darkness lurking within him.

The core of the Sentry's mythology is the Void, a monstrous shadow entity that is the equal and opposite force to Bob Reynolds's heroic power. This duality drives some of the most compelling stories in his history. His reintegration into the Marvel Universe during the New Avengers era brought him into the spotlight for a new generation of readers, and his slow psychological unraveling across Brian Michael Bendis's Avengers run kept collectors engaged for years. His tenure with the Dark Avengers — serving under Norman Osborn during the Dark Reign era — pushed him to his absolute breaking point, culminating in the catastrophic events of Siege, where his complete mental collapse had world-shaking consequences. Siege #1-4 remains a key storyline for any collector following his arc.

The Sentry's story did not end with his apparent death. Marvel has revisited and reinvented the character multiple times, including a haunting resurrection that saw him serving as a Horseman of Apocalypse and later clashing once again with the heroes who both feared and depended on him. Each return adds new layers to one of the hobby's most unpredictable characters, making back issues from his various appearances consistently sought after by fans who want the complete picture of his fractured legacy.

For collectors, the Sentry represents a uniquely rewarding corner of the Marvel universe. His original 2000 limited series, the 2005 follow-up volumes, and his key appearances across New Avengers, Dark Avengers, and Siege offer a deep and interconnected reading experience. Variant covers, rare printings from the original launch, and his crossover appearances across major event books make hunting down a complete Sentry run a genuinely exciting pursuit. Whether you are drawn to the raw power fantasy, the psychological horror of the Void, or the tragedy of Bob Reynolds himself, the Sentry's bibliography rewards the dedicated collector.