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Classic Characters

Captain Defender
ID Blackrock
Name Onyx/James "Jim" Marcum
Birthplace The Obsidian Keep, Darkearth
Birthdate December 24
Age 29
Marital status Single
Known family Obsydian (father), Katrina Marcum (mother)
Occupation Prince of the Kingdom of Twilight in Darkearth; linebacker for the New York Titans (as Jim Marcum)
Base of operations The Keep, New York City, NY
Height 9'6" (6'5" as Jim Marcum)
Weight 6,880 lbs. (215 lbs. as Jim Marcum)
Hair Black
Eyes Blue
Distinctive features As Blackrock, Jim has black, rocky skin, his sclera are solid blue, and he has no pupils or irises. He has handsome features and a muscular build.

The son of Obsydian, the rock giant despot who ruled the Kingdom of Twilight in the other-dimensional realm of Darkearth, and the human geologist Katrina Marcum, Onyx learned he could switch between his human and rock form as a young child.

As an adult, Onyx stole the Ring of Midnight from his tyrannical father and fled to his mother's world of Earth. He arrived in Central Park, where he was mistaken as a monster by the population and was engaged in combat by Captain Defender and Pixie. After a brief battle, they decided to band together as the Keepers, and Onyx adopted the human guises of Jim Marcum and Blackrock.

Personality Blackrock is easygoing and an all-around nice guy. His friendly demeanor and gregarious attitude belies his royal lineage.

Blackrock has increased height, mass and strength and is able to lift 30 tons. He can see into the ultraviolet portion of the electromagnetic spectrum. His rock skin is three times as resistant as concrete.

His goggles protect him from flash attacks by reflecting them back at the source.

He wears the magical Ring of Midnight, which allows him to fly eight times a day, project fields of darkness that blocks normal sight three times a day, and fire four beams of armor-piercing darkness. The ring does not work in darkness fields or at night, and recharges its lost charges every morning at dawn.

In darkness fields, he reverts to his human form of Jim Marcum, whose sole power is his ultraviolet vision.

Skills He is a skilled in weakness detection (by determining the weak point of an object, he can inflict extra damage by striking there).
Costume designed by Todd S. Tuttle
Copyright © 1983–2019 Todd S. Tuttle
All content and characters copyright
© 1984–2019 by Todd S. Tuttle/TNT Comics
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